Small fruit with fresh flavour (9)
I believe the answer is:
spearmint
'flavour' is the definition.
(I've seen this before)
'small fruit with fresh' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'fruit' becomes 'pear' (pear is a kind of fruit).
'with' means one lot of letters go next to another.
'fresh' becomes 'mint'.
's'+'pear'+'mint'='SPEARMINT'
(Other definitions for spearmint that I've seen before include "Aromatic plant" , "Strongly flavoured herb" , "Garden flavouring" , "Herb used for flavouring" , "fresh flavour" .)