Is in a hide to see a bird (6)
I believe the answer is:
siskin
'a bird' is the definition.
(siskin is a kind of bird)
'is in a hide' is the wordplay.
'in' is an insertion indicator.
'a hide' becomes 'skin' ('skin' can be a synonym of 'hide').
'is' going within 'skin' is 'SISKIN'.
'to see' acts as a link.
(Other definitions for siskin that I've seen before include "Little bird" , "Small yellow and black finch" , "Type of finch" , "Small bird - kiss in (anag)" , "Yellowish-green finch" .)