24 across
Check
temperature
after
period
of
chill
weather
(9)
Check temperature after period of chill weather (9)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
Right, so Check is your definition there, meaning to restrain or hold something back. For the wordplay, start with REST — that's your period of chill, as in a bit of relaxation — then stick RAIN on for the weather, and finally pop T (the usual abbreviation for temperature) on the very end.