Turner in hall at Hexham (5)
I believe the answer is:
lathe
'turner' is the definition.
(a lathe is something which 'turns')
'in hall at hexham' is the wordplay.
'in' indicates a hidden word.
'LATHE' is hidden in the letters of 'hall at hexham'.
(Other definitions for lathe that I've seen before include "Machine for cutting, drilling or polishing" , "Wood-turning machine" , "Turner's machine" , "Turner's tool" , "Turning implement" .)