Commendation a US fruit is about to get (8)
I believe the answer is:
applause
'commendation' is the definition.
(I know that applause is a type of commendation)
'a us fruit is about to get' is the wordplay.
'fruit' becomes 'apple' (apple is a kind of fruit).
'is about' means one lot of letters goes inside another.
'to get' means one lot of letters goes inside another.
'us' going inside 'apple' is 'appluse'.
'a' placed inside 'appluse' is 'APPLAUSE'.
(Other definitions for applause that I've seen before include "Mark of appreciation like clapping and cheering" , "Audible indication of approval or praise" , "Burst of clapping" , "loud support" , "Clapping US appeal?" .)