Bulb, one often lit up around foyer (7)
I believe the answer is:
shallot
'bulb' is the definition.
(I know that shallot is a type of bulb)
'one often lit up around foyer' is the wordplay.
'one often lit up' becomes 'sot' (sot can mean a drunk - lit up can mean drunk).
'around' indicates putting letters inside.
'foyer' becomes 'hall' (synonyms).
'sot' placed around 'hall' is 'SHALLOT'.
(Other definitions for shallot that I've seen before include "Rowing boat" , "Small onion-like bulb used for seasoning" , "Scallion" , "It resembles an onion" , "bit of salad" .)