Two words form the name of a fictional 28, described by his creator as a ‘22A/31/26’. Remaining across unclued lights are associated with the first word and down ones with the second. Elsewhere, ignore an accent.
 

Across

 
1    Jackanapes swimming away from Jamaica belly-flops (8)
6    Taxmen laugh at seventy retired coppers (6)
11    Trifler enthrals former railman (10)
14    Old statesmen stands beside painter in food shop (8)
16    Some sham or phony rogue … (5)
17    … uttered marks (unacceptable) he had (7)
19    Most severe wind is in the Camargue (9)
23    Place with a birch tree (6)
24    Home Secretary boards train for subdistrict (6)
30    Duplicate data in massive box (9, hyphened)
32    Pet with internal ailment pulled round and recovered (7)
33    Slice the local farmer cut (7)
35    Forgetfulness hindered ambassador (5)
36    Henry painted yacht in purple (8)
37    Ring absent girl (5)
38    Early C20 furniture awed Adrian when polished (10)
39    Teas dogs love disrupting (6)
40    Danseuse forever in black before (8)
 

Down

 
1    Pole picks up stylish college’s award (14)
2    Athletic irrational swimmer getting tipsy (7, three words)
3    Bunch wearing dainty skullcap (7)
5    Nearly all ships see small vessel (4)
7    Landslide to occur across Guinea (8)
8    Living again on old centimes, short of money (bust) (11, hyphened)
9    Drug to ease below par S Africa (7)
10    Unexpected extra piping? (14, four words)
12    Prince imprisons very loud libertines … (5)
15    … to silence classy part of town (4)
20    Menial astride knight’s mount (4)
21    Sage loses heart early (4)
22    Killer — one detectives trapped in store (8)
25    Separate elements of seamanly rigging, master neglected (7)
27    Mother superior somewhere in Southwark? (7)
29    Fish abandons island home (5)
30    Info about American cherry (4)
34    Try special pill (4)
 
A first prize of £30 for the first correct solution opened on 11 May. There are two runners-up prizes of £20. (UK solvers can choose to receive the latest edition of the Chambers Dictionary instead of cash— ring the word ‘Dictionary’.) Entries to: Crossword 2208, The Spectator, 22 Old Queen Street, London SW1H 9HP. Please allow six weeks for prize delivery.