Crossword Genius

Stick promo in this place (6)

Ross

I believe the answer is:

adhere

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

'promo in this place' is the wordplay.
'promo' becomes 'ad' (I can't justify this - if you can you should give a lot more credence to this answer).
'in this place' becomes 'here' (synonyms).
'ad'+'here'='ADHERE'

Can you help me to learn more?

(Other definitions for adhere that I've seen before include "paste" , "Stick L" , "Stick firmly" , "Stick - join" , "Hold fast, stand by" .)

I've seen this clue in The Times.
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