Many fuss after returning eggs and fruit (7)
I believe the answer is:
avocado
'fruit' is the definition.
(I know that avocado is a type of fruit)
'many fuss after returning eggs' is the wordplay.
'many' becomes 'c' (C is the Roman numeral for a00).
'fuss' becomes 'ado' (synonyms).
'after' is a charade indicator (letters next to each other).
'returning' is a reversal indicator.
'eggs' becomes 'ova' (term for egg cells).
'ova' reversed gives 'avo'.
'c'+'ado'='cado'
'cado' after 'avo' is 'AVOCADO'.
'and' is the link.
(Other definitions for avocado that I've seen before include "Shade of green" , "one's stoned?" , "Are mostly outspoken party getting" , "Alligator pear" , "Pulpy fruit" .)