Timely restriction on a cad having more than a couple! (6)
I believe the answer is:
curfew
'timely restriction' is the definition.
'curfew' can be an answer for 'restriction' (I've seen this before). I am not sure about the 'timely' bit.
'cad having more than a couple' is the wordplay.
'cad' becomes 'cur' (I've seen this in another clue).
'having' is a charade indicator (letters next to each other).
'more than a couple' becomes 'few' (I can't justify this - if you can you should give a lot more credence to this answer).
'cur'+'few'='CURFEW'
'on a' is the link.
Can you help me to learn more?
(Other definitions for curfew that I've seen before include "Nighttime limitation on movement" , "When people were housebound" , "restraining order" , "when it's time to go home" , "Restriction on nocturnal movement" .)