Lobby head of entertainment for orchestra (5)
I believe the answer is:
halle
'orchestra' is the definition.
(The Halle, UK symphony orchestra)
'lobby head of entertainment' is the wordplay.
'lobby' becomes 'hall' ('hall' can be a synonym of 'lobby').
'head of' says to take the initial letters.
The first letter of 'entertainment' is 'e'.
'hall'+'e'='HALLE'
'for' is the link.
(Other definitions for halle that I've seen before include "Orchestra based in Manchester" , "Berry, possibly" , "Manchester-based orchestra" , "Manchester's orchestra" , "Manchester orchestra founder" .)