Considers carefully if time to abandon gym equipment (6)
I believe the answer is:
weighs
'considers carefully' is the definition.
'time to abandon gym equipment' is the wordplay.
'time' becomes 't'.
'to abandon' indicates named letters should be taken away.
'gym equipment' becomes 'weights'.
'weights' with 't' removed is 'WEIGHS'.
'if' is the link.
(Other definitions for weighs that I've seen before include "Raises (anchor)" , "Measures the heaviness of" , "Considers" .)