Charm going topless at fashionable race meeting (5)
I believe the answer is:
ascot
'race meeting' is the definition.
(I've seen this before)
'charm going topless' is the wordplay.
'charm' becomes 'mascot' (synonyms).
'going topless' means to remove the first letter.
'mascot' with its initial letter taken off is 'ASCOT'.
'at fashionable' acts as a link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for ascot that I've seen before include "course without any fences!" , "Necktie with wide square ends" , "Berks racecourse" , "Place for meeting" , "Racecourse near Windsor" .)