Petty or trifling (7)
I believe the answer is:
trivial
I believe this clue is a double definition.
'petty' is the first definition.
(I know that petty can be written as trivial)
'trifling' is the second definition.
(I've seen this before)
(Other definitions for trivial that I've seen before include "Piddling" , "Footling" , "Of little importance" , "Quite unimportant and paltry" , "not significant" .)