Stop publicity being given to competition? (7)
I believe the answer is:
prevent
'stop' is the definition.
(I've seen this before)
'publicity being given to competition?' is the wordplay.
'publicity' becomes 'pr'.
'being given to' means one lot of letters go next to another.
'competition?' becomes 'event' (competition is a kind of event).
'pr'+'event'='PREVENT'
(Other definitions for prevent that I've seen before include "Stop, avert" , "Thwart" , "Keep from arising" , "Obviate" , "Bar" .)