Gossip when pal tailed by celebrity’s girlfriend? (7)
I believe the answer is:
chinwag
'gossip' is the definition.
(I've seen this before)
'pal tailed by celebrity's girlfriend?' is the wordplay.
'pal' becomes 'china' (china plate is Cockney rhyming slang for mate).
'tailed' means to remove the last letter (to tail something can mean to remove its end).
'by' is a charade indicator (letters next to each other).
'celebrity's girlfriend?' becomes 'wag' (short for footballers' wives and girlfriends).
'china' with its last letter taken off is 'chin'.
'chin'+'wag'='CHINWAG'
'when' acts as a link.
(Other definitions for chinwag that I've seen before include "Chat (slang)" , "Appoint" , "Move mandible about in informal chat" , "Gossip" , "Conversation (slang)" .)