Heavy trampolinist? (7)
I believe the answer is:
bouncer
I believe this clue is a double definition.
'heavy' is the first definition.
(both can mean a member of security staff)
'trampolinist?' is the second definition.
(I've seen this before)
(Other definitions for bouncer that I've seen before include "A heavy - climbing cricket delivery" , "One who keeps troublemakers out of a bar" , "Cricket delivery - employee ejecting troublemakers" , "It could be a ball or a chuckerout" , "Dance-hall employee" .)