Old men rolling over on street to find shelter (5)
I believe the answer is:
roost
'shelter' is the definition.
(roost is a kind of shelter)
'old men rolling over on street' is the wordplay.
'old' becomes 'o' (common abbreviation eg in OE for Old English).
'men' becomes 'or' (I've seen this in other clues).
'rolling over' says the letters should be written in reverse.
'on street' becomes 'st' (I've seen this in other clues).
'o'+'or'='oor'
'oor' in reverse letter order is 'roo'.
'roo'+'st'='ROOST'
'to find' is the link.
(Other definitions for roost that I've seen before include "Glowing with joy" , "Hen house; perch" , "The cock rules it" , "settle for a nap" , "unwelcome to come home to?" .)