Decrease in measured wind levels (7)

I believe the answer is:

dwindle

'decrease' is the definition.
(I know that dwindle is a type of decrease)

'in measured wind levels' is the wordplay.
'in' says the answer is hidden in the clue.
'DWINDLE' can be found hidden inside 'measured wind levels'.

(Other definitions for dwindle that I've seen before include "Grow smaller, taper off" , "Decline" , "Get smaller, less" , "Die away" , "Degenerate" .)

I've seen this clue in The Sun.

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