Past being in love, really? (4)
I believe the answer is:
over
'past' is the definition.
(I've seen this before)
'in love really?' is the wordplay.
'in' says the answer is hidden in the clue.
'OVER' is hidden within 'love really'.
'being' acts as a link.
(Other definitions for over that I've seen before include "Finished like cricket session" , "jumped fence" , "A bowler's round in cricket" , "Action far more drastic than necessary" , "Passed" .)