Stumped, after judge's secret meeting (5)
I believe the answer is:
tryst
'secret meeting' is the definition.
(I've seen this before)
'stumped after judge's' is the wordplay.
'stumped' becomes 'st' (I've seen this in other clues).
'after' means one lot of letters go next to another.
'judge' becomes 'try' (trying is a kind of judging**).
'st' put after 'try' is 'TRYST'.
(Other definitions for tryst that I've seen before include "An archaic lovers' meeting" , "Pre-arranged (secret) meeting" , "Date" , "Romantic assignation" , "Secret assignment" .)