Appeared before crowd in musical (7)
I believe the answer is:
camelot
'musical' is the definition.
(I've seen this before)
'appeared before crowd' is the wordplay.
'appeared' becomes 'came' (I've seen this in other clues).
'before' is a charade indicator (letters next to each other).
'crowd' becomes 'lot' (a lot of people).
'came'+'lot'='CAMELOT'
'in' is the link.
(Other definitions for camelot that I've seen before include "Lerner and Loewe musical" , "King Arthur's court - or JFK's" , "Arthur's or Kennedy's court?" , "Legendary Arthurian kingdom" , "King Arthur's capital" .)