Provide food consumed in common room initially (5)
I believe the answer is:
cater
'provide food' is the definition.
(I've seen this in another clue)
'consumed in common room initially' is the wordplay.
'consumed' becomes 'ate' (to eat is to consume food).
'in' indicates putting letters inside.
'initially' indicates taking the first letters.
The initial letters of 'common room' is 'cr'.
'ate' going within 'cr' is 'CATER'.
(Other definitions for cater that I've seen before include "Provide goods or services for" , "Provide food and drink (for an event)" , "Provide what is required" , "Supply food and drink" , "Provide for function" .)