Passing wind, single dad goes back inside (8)
I believe the answer is:
elapsing
'passing' is the definition.
('elapse' can be a synonym of 'pass')
'wind single dad goes back inside' is the wordplay.
'wind' indicates anagramming the letters.
'dad' becomes 'pa' ('pa' can be a synonym of 'dad').
'goes back' is a reversal indicator.
'inside' is an insertion indicator.
'pa' written backwards gives 'ap'.
'single' with letters rearranged gives 'elsing'.
'elsing' placed around 'ap' is 'ELAPSING'.
(Another definition for elapsing that I've seen is " Passing, as time".)