Apple in a tree shaken about (5)
I believe the answer is:
eater
'apple' is the definition.
(I've seen this before)
'a tree shaken about' is the wordplay.
'shaken' indicates anagramming the letters.
'about' indicates putting letters inside.
'tree' with letters rearranged gives 'eter'.
'a' inserted inside 'eter' is 'EATER'.
'in' acts as a link.
(Other definitions for eater that I've seen before include "diner" , "Apple, perhaps" , "Fruit (but not a cooker)" , "Consumer at table" , "Type of apple" .)