Makeshift (7)
'makeshift' is the definition.
(synonyms)
This is all the clue.
(Other definitions for stopgap that I've seen before include "Interim" , "A temporary substitute or solution" , "caretaker" , "Temporary measure" , "Makeshift" .)
'makeshift' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ad hoc that I've seen before include "(Of committee) formed for a single purpose" , "(Of group) formed for one purpose only" , "One-off" , "Intended for one specific matter" , "Arranged for one purpose only (Latin)" .)