In Chester he accommodated a flightless bird (4)
I believe the answer is:
rhea
'a flightless bird' is the definition.
(rhea is a kind of flightless bird)
'in chester he accommodated' is the wordplay.
'in' says the answer is hidden in the clue.
'RHEA' is hidden in the letters of 'chester he accommodated'.
(Other definitions for rhea that I've seen before include "S. Amer. flightless bird" , "Ostrich-like bird - satellite of Saturn" , "Grounded bird" , "Fast runner" , "nonflyer" .)