Show nerve in cryptic clue for “bag” or “sag”? (4,4)
I believe the answer is:
talk back
'bag or sag?' is the definition.
I can't tell whether this definition defines the answer.
'show nerve in cryptic clue' is the wordplay.
'show' becomes 'talk show' (talk show is a kind of show).
'nerve in cryptic clue' becomes 'back' (I am not sure about this - if you are sure you should believe this answer much more).
'talk'+'back'='TALK-BACK'
'for' is the link.
Can you help me to learn more?
(Another definition for talk back that I've seen is " System of two-way communication".)