Return call or sign of broken engagement? (4,4)
I believe the answer is:
ring back
'sign of broken engagement?' is the definition.
The definition suggests a verb in its base form which matches the answer.
'return call' is the wordplay.
I cannot quite see how this works, but
'call' could be 'ring' (telephone call) and 'ring' is located in the answer.
The remaining letters 'back' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'or' acts as a link.
Can you help me to learn more?
(Another definition for ring back that I've seen is " Return phone call".)