The first three or four letters of eight unclued lights (including one proper name) form a set said to be safe for 1A. Elsewhere, ignore an accent.
 

Across

10    Sauce that will do OK for Frankfurters (4)
12    Sea-fishers lent warmer pants (10)
14    Upset goddess upset menial (3)
15    Departed by rail, oddball with excrescence (8)
17    Some covet nasty heating vessels (5)
19    Shaping demo we echoed Tom (6)
22    Change national registration of judge and convict (6)
24    Soldier meets soldiers in cave (5)
27    OED founder new viral flu infected (9)
29    Farm cottage’s metal barrier (5)
31    Chap spun a hat in silky cloth (6)
36    Dramatist in a...