22 across
Father
working
in
old
juvenile
training
pants
(1-6)
Father working in old juvenile training pants (1-6)
-
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition here is pants, and the wordplay builds the rest. Take FR for Father and ON for working, then slot them inside YTS (the old Youth Training Scheme, our "old juvenile training"), giving Y-FR-ON-TS.