Plant saving fuel, plant saving fuel? (8)
I believe the answer is:
repeated
'plant saving' is the definition.
Both the answer and definition are adjectives. Perhaps they are linked in a way I don't understand?
'fuel plant saving fuel?' is the wordplay.
'fuel plant' becomes 'reed' (I can't justify this - if you can you should give a lot more credence to this answer).
'saving' indicates putting letters inside.
'fuel?' becomes 'peat' (peat is a kind of fuel).
'reed' enclosing 'peat' is 'REPEATED'.
Can you help me to learn more?
(Other definitions for repeated that I've seen before include "Recurring again and again" , "Saying again" , "Iterated" , "Duplicated" , "Continual" .)