Crossword Genius

Dull group making a difference? (9)

Ross

I believe the answer is:

mattering

'making a difference?' is the definition.

'dull group' is the wordplay.
'dull' becomes 'matte' (similar in meaning).
'group' becomes 'ring'.
'matte'+'ring'='MATTERING'

I've seen this clue in The Times.
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