1A (hyphened) suggests a word which, with changes to its 7D 33, becomes the four other words (including a name) suggested by the remaining unclued lights (including a pair). The word will appear in the completed grid and must be shaded.
 

Across

7    Outburst of song from tailor (3)
11    Lid of fryer accepted by mummy (6)
13    Hooters spoiling film again (7)
15    Central Zanzibaris run out and kiss in Scottish district (5)
16    George papers hypothetical surface (5)
17    Pip causing endless messes (6)
18    Lass returning for important date (5)
20    Pump supplying priest and townie (6)
21    British monarch embedding one shrub (5)
29    Girl in rage...