Feathers in fruit tree, silver and blue at the end (7)
I believe the answer is:
plumage
'feathers' is the definition.
(thesaurus)
'fruit tree silver and blue at the end' is the wordplay.
'fruit tree' becomes 'plum' (plum is a kind of fruit tree**).
'silver' becomes 'ag' (Ag is the chemical symbol for silver).
'and' is a charade indicator (letters next to each other).
'at the end' indicates one should take the final letters.
The final letter of 'blue' is 'e'.
'plum'+'ag'+'e'='PLUMAGE'
'in' is the link.
(Other definitions for plumage that I've seen before include "One's feathers" , "Bird's covering of feathers" , "Cover for diver" , "A bird's feathers, may be fancy" , "coat" .)