Place to sleep, temperature requiring jumpers on (5)
I believe the answer is:
roost
'place to sleep' is the definition.
(where birds sleep)
'temperature requiring jumpers on' is the wordplay.
'temperature' becomes 't' (abbreviation).
'requiring jumpers' becomes 'roos' (I am not sure about this - if you are sure you should believe this answer much more).
'on' is a charade indicator (letters next to each other).
't' put after 'roos' is 'ROOST'.
Can you help me to learn more?
(Other definitions for roost that I've seen before include "(Bird) settle for sleep" , "Hen house; perch" , "Colony of bats; perch" , "unwelcome to come home to?" , "Rest on a perch" .)