Packed hotel in credit (5)
I believe the answer is:
thick
'packed' is the definition.
(thesaurus)
'hotel in credit' is the wordplay.
'hotel' becomes 'h' (phonetic alphabet: alpha, bravo, charlie etc.).
'in' indicates putting letters inside.
'credit' becomes 'tick' (I've seen this before).
'h' placed inside 'tick' is 'THICK'.
(Other definitions for thick that I've seen before include "Wide -- impenetrable" , "Slow" , "Stupid; close-packed" , "Stupid; (of fog) dense" , "Crowded" .)