One much spoilt, possibly, by stewardesses? (5)
I believe the answer is:
pilot
'spoilt possibly by stewardesses?' is the definition.
The answer and definition are different parts of speech. However, adjectives and past participle verbs occasionally define each other.
'one much' is the wordplay.
'one' becomes 'pi' (I can't explain this - if you can you should give a lot more credence to this answer).
'much' becomes 'lot' (I've seen this in other clues).
'pi'+'lot'='PILOT'
Can you help me to learn more?
(Other definitions for pilot that I've seen before include "One licensed to fly" , "who shows the way?" , "One who brings a vessel into port" , "Person in charge of aircraft" , "Name of Mr Rochester's dog" .)