Stops roll with hollow guffaws (5)
I believe the answer is:
bungs
'stops' is the definition.
(bung is a kind of stop)
'roll with hollow guffaws' is the wordplay.
'roll' becomes 'bun' (synonyms).
'with' says to put letters next to each other.
'hollow' suggests removing the centre.
'guffaws' with its centre taken out is 'gs'.
'bun'+'gs'='BUNGS'
(Other definitions for bungs that I've seen before include "Puts a stop to" , "bribes?" .)