Worried sort fencing old hen house (5)
I believe the answer is:
roost
'hen house' is the definition.
(I've seen this before)
'worried sort fencing old' is the wordplay.
'worried' is an anagram indicator (worry can mean to interfere with or disturb).
'fencing' indicates putting letters inside (to fence can mean to contain or put a limit round).
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'sort' anagrammed gives 'rost'.
'rost' placed around 'o' is 'ROOST'.
(Other definitions for roost that I've seen before include "Bird's night spot" , "Place where birds rest" , "Perch for a sleeping bird" , "Shetland tidal water" , "Place where birds perch or settle for sleep" .)