Mentioned the arbiter 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 understand how they can define each other.
'arbiter had slipped up' is the wordplay.
'arbiter' becomes 'ref' (I've seen this in another clue).
'had' says to put letters next to each other.
'slipped up' becomes 'erred' (I've seen this in another clue).
'ref'+'erred'='REFERRED'
'the' is the link.
Can you help me to learn more?
(Other definitions for referred that I've seen before include "related" , "looked up" , "Brought up, mentioned" , "appealed against" , "Adverted, brought up" .)