Room finds worker sleeping (7)
I believe the answer is:
dormant
'sleeping' is the definition.
(I know that sleeping can be written as dormant)
'room finds worker' is the wordplay.
'room' becomes 'dorm' (dorm room is a kind of room).
'finds' says to put letters next to each other.
'worker' becomes 'ant' (worker is a type of ant).
'dorm'+'ant'='DORMANT'
(Other definitions for dormant that I've seen before include "Suspended" , "Hibernating" , "Inactive, but not dead" , "Sleeping or inactive, say volcano" , "asleep" .)