Mentioned the judge had slipped up (8)
I believe the answer is:
referred
'mentioned' is the definition.
Although both the answer and definition are past participle verbs, I can't see how one could define the other.
'judge had slipped up' is the wordplay.
'judge' becomes 'ref' (referee).
'had' says to put letters next to each other.
'slipped up' becomes 'erred' (I've seen this in another clue).
'ref'+'erred'='REFERRED'
'the' acts as a link.
Can you help me to learn more?
(Other definitions for referred that I've seen before include "related" , "Adverted, cited" , "Alluded (to)" , "looked up" , "Adverted, brought up" .)