Something to cue up for? (5)
I believe the answer is:
masse
'for?' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's a link between them I don't understand?
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for masse that I've seen before include "'En ..., all together (5)'" , "Swerve shot at billiards" , "Swerving snooker stroke" .)