Chicken's perch (5)
I believe the answer is:
roost
'chicken's perch' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for roost that I've seen before include "where fliers land" , "somewhere to sleep" , "Shetland tidal water" , "Where bats congregate" , "Fowl's perch" .)