Stop running some installation (5)
I believe the answer is:
stall
'stop running' is the definition.
(I've seen this before)
'some installation' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'STALL' is hidden within 'installation'.
(Other definitions for stall that I've seen before include "Animal compartment" , "(Of engine) stop running; booth" , "seat in church" , "Hedge" , "Kiosk" .)