Waits to execute youngster (5,2)

I believe the answer is:

hangs on

'waits' is the definition.
(hanging on is a kind of waiting)

'execute youngster' is the wordplay.
'execute' becomes 'hang' (hanging is a kind of executing).
'youngster' becomes 'son' (a child).
'hang'+'son'='HANGS ON'

'to' is the link.

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app