Trust former sweetheart to hang around clubs (6)
I believe the answer is:
expect
'trust' is the definition.
(synonyms)
'former sweetheart to hang around clubs' is the wordplay.
I cannot really understand how this works, but
'former' could be 'ex' and 'ex' is found within the answer.
'sweetheart' could be 'e' (the heart/centre of 'sweet') and 'e' is found in the answer.
'around' could be 'c' (abbreviation for 'circa') and 'c' is found in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for expect that I've seen before include "Forecast" , "Assume or look forward to" , "Confidently hope" , "Be pregnant" , "Regard (something) as likely to happen" .)