17 across
One
returning
in
jumper,
say
–
it’s
for
protection
(6)
One returning in jumper, say – it’s for protection (6)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
Right, so "it's for protection" at the end is your definition — a toecap protects the toe of your shoe. For the wordplay, "one" gives you ACE, and "returning" tells you to reverse it, giving ECA. Then you tuck that inside TOP, since a jumper is an example of a top ("say" flags it as an example) — slot ECA into TOP and you get the answer.