Inspiration pilot ultimately found in feature of his training (10)
I believe the answer is:
stimulator
'inspiration pilot ultimately found in feature of his training' is the definition.
The definition suggests a singular noun which matches the answer.
'feature of his training' is the wordplay.
I cannot quite understand how this works, but
'feature' could be 'tor' (I have seen 'feature of Glastonbury' mean 'tor' so perhaps 'feature' could also mean 'tor') and 'tor' is found within the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Another definition for stimulator that I've seen is " Exciting person".)