23 across
Calm
tips
from
positive
pro
(5)
Calm tips from positive pro (5)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
The definition is Calm. For the wordplay, take the tips — the two ends — of positive, which gives you PE, then tack on ACE, meaning a pro or expert, and you've got PE+ACE.