I'd come back to throw pasties and fritter away (9)
I believe the answer is:
dissipate
'fritter away' is the definition.
(synonyms)
'i'd come back to throw pasties' is the wordplay.
'come back' says the letters should be written in reverse.
'to throw' indicates anagramming the letters.
'id' backwards is 'di'.
'pasties' anagrammed gives 'ssipate'.
'di'+'ssipate'='DISSIPATE'
'and' is the link.
(Other definitions for dissipate that I've seen before include "Fritter away" , "Be dispelled/dispersed" , "Exhaust" , "Waste (money/energy)" , "scatter" .)