Stick notice on present (6)

I believe the answer is:

adhere

'stick' is the definition.
(to adhere to something is to stick to it)

'notice on present' is the wordplay.
'notice' becomes 'ad' (both can mean an advertisement).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'present' becomes 'here' (both can mean in attendance).
'ad'+'here'='ADHERE'

(Other definitions for adhere that I've seen before include "Stick with header" , "Remain attached" , "Stick L" , "Stick or cleave to" , "Stick firmly" .)

I've seen this clue in The Guardian, The Times and The Telegraph.

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