Two fruit, say (4)
I believe the answer is:
pair
'two' is the definition.
(pair is a kind of two)
'fruit say' is the wordplay.
'fruit' becomes 'pear' (pear is a kind of fruit).
'say' indicates a 'sounds like' (homophone) clue.
'pear' sounds like 'PAIR'.
(Other definitions for pair that I've seen before include "flight of stairs" , "how braces come" , "Husband and wife" , "Put together - two of a kind" , "Brace, couple" .)