Prevent containers being raised (4)
I believe the answer is:
stop
'prevent' is the definition.
(stopping is a kind of preventing)
'containers being raised' is the wordplay.
'containers' becomes 'pots' (pot is a kind of container).
'being raised' shows that the letters should be reversed in order.
'pots' reversed gives 'STOP'.
(Other definitions for stop that I've seen before include "End or pause" , "set of organ pipes" , "Quit" , "Wind up" , "Bung" .)