Quarrel involving fruit, extremely hot (5)
I believe the answer is:
fight
'quarrel' is the definition.
(I've seen this before)
'fruit extremely hot' is the wordplay.
'fruit' becomes 'fig' (fig is a kind of fruit).
'extremely' says to hollow out the word (remove centre letters) (only the extremes of the word are used).
'hot' with its centre removed is 'ht'.
'fig'+'ht'='FIGHT'
'involving' is the link.
(Other definitions for fight that I've seen before include "Bundle" , "Come to blows" , "Brawl; argue" , "Struggle; quarrel" , "Box" .)