Section of a stable or theatre (5)
I believe the answer is:
stall
'section of a stable or theatre' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for stall that I've seen before include "Delay - booth for selling goods" , "Equivocate" , "Market stand; delay" , "Temporise; sales booth" , "Stable compartment" .)