Red barrel we put out for a bird (4,7)
I believe the answer is:
reed warbler
'bird' is the definition.
(I've seen this before)
'red barrel we put out' is the wordplay.
'put out' is an anagram indicator.
'red'+'barrel'+'we'='redbarrelwe'
'redbarrelwe' anagrammed gives 'REED-WARBLER'.
'for a' acts as a link.
(Other definitions for reed warbler that I've seen before include "Bird" , "Small songbird of wetlands and river banks" , "Flighty creature" .)