This writer involved in a revolutionary fuel shares advances (13)
I believe the answer is:
ameliorations
'advances' is the definition.
The answer and definition can be both acts as well as being plural nouns.
Perhaps you can see a link between them that I don't see?
'this writer involved in a revolutionary fuel shares' is the wordplay.
'this writer' becomes 'me' (the person who wrote the clues).
'involved in' is an insertion indicator.
'revolutionary' says the letters should be written in reverse (letters revolve around).
'fuel' becomes 'oil' (oil is a type of fuel).
'shares' becomes 'rations' (ration is a kind of share).
'oil' back-to-front is 'lio'.
'a'+'lio'='alio'
'me' inserted inside 'alio' is 'amelio'.
'amelio'+'rations'='AMELIORATIONS'
Can you help me to learn more?