Vessel given house-room (4)
I believe the answer is:
bath
'room' is the definition.
(bath is a kind of room)
'vessel given house' is the wordplay.
'vessel given' becomes 'bat' (I am not sure about this - if you are sure you should believe this answer much more).
'house' becomes 'h'.
'bat'+'h'='BATH'
Can you help me to learn more?
(Other definitions for bath that I've seen before include "English city - tub" , "Stopper for hole (don't let 8 through it!)" , "Roman Aquae Sulis" , "city that may or may not chime with 27 [HEARTH]" , "Sit in it to wash" .)