Two hands required for tropical fruit (6)
I believe the answer is:
pawpaw
'tropical fruit' is the definition.
'pawpaw' can be an answer for 'fruit' (pawpaw is a kind of fruit). I am not sure about the 'tropical' bit.
'two hands' is the wordplay.
'two hands' means two replacements for 'hand'.
'hand' becomes 'paw' (synonyms).
'hand' becomes 'paw' (synonyms).
'paw'+'paw'='PAWPAW'
'required for' acts as a link.
Can you help me to learn more?
(Other definitions for pawpaw that I've seen before include "foul once" , "Custard apple tree" , "Fruit" , "Papaya" .)