Worshipper in orchestra stalls (5)
I believe the answer is:
rasta
'worshipper' is the definition.
(I've seen this before)
'in orchestra stalls' is the wordplay.
'in' indicates the answer is hidden within the clue.
'RASTA' is hidden in the letters of 'orchestra stalls'.
(Other definitions for rasta that I've seen before include "Often a Jamaican" , "sectarian worshipper" , "religious believer" , "Jamaican believer" , "worshipper from Jamaica" .)