Midday air aroused farmworker (9)
I believe the answer is:
dairymaid
'farmworker' is the definition.
(dairymaid is a kind of farm worker)
'midday air aroused' is the wordplay.
'aroused' indicates an anagram (letters roused or stirred up into a new form).
'midday'+'air'='middayair'
'middayair' is an anagram of 'DAIRYMAID'.
(Other definitions for dairymaid that I've seen before include "Person milking" , "Woman who milked cows" , "Girl perhaps making butter or cheese" , "One used to parlour work" , "Worker with milk, butter, etc" .)