Cheerful jailbird temporarily housed? (9)
I believe the answer is:
contented
'cheerful' is the definition.
'jailbird temporarily housed?' is the wordplay.
'jailbird' becomes 'con' (I've seen this in other clues).
'temporarily housed?' becomes 'tented'.
'con'+'tented'='CONTENTED'
(Other definitions for contented that I've seen before include "Not decent (anag) - cheerful" , "Feeling satisfied" , "Satisfied with things as they are" , "'Satisfied, relaxed and happy (9)'" .)