Numbers given hotel grub (4)
I believe the answer is:
nosh
'grub' is the definition.
(I've seen this before)
'numbers given hotel' is the wordplay.
'numbers' becomes 'nos' ('no' is an abbreviation for number).
'given' says to put letters next to each other.
'hotel' becomes 'h' (phonetic alphabet).
'nos'+'h'='NOSH'
(Other definitions for nosh that I've seen before include "Fare" , "Slangy food or meal" , "Eat (slang) -- food (slang)" , "Scoff" , "Eat (sl.)" .)