Briefly outspoken during fuss to get fruit (7)
I believe the answer is:
avocado
'fruit' is the definition.
(I know that avocado is a type of fruit)
'briefly outspoken during fuss' is the wordplay.
'briefly' means to remove the last letter.
'outspoken' becomes 'vocal' (synonyms).
'during' indicates putting letters inside.
'fuss' becomes 'ado' (synonyms).
'vocal' with its final letter taken off is 'voca'.
'voca' put into 'ado' is 'AVOCADO'.
'to get' acts as a link.
(Other definitions for avocado that I've seen before include "Heavily stoned fruit" , "Green-fleshed fruit" , "Yellowish green" , "Dull greenish colour" , "Savoury pear-shaped fruit" .)