Sets fire to hills without revolutionary (7)
I believe the answer is:
torches
'sets fire' is the definition.
The answer and definition can be both related to change as well as being verbs in their -s form.
Maybe you can see a link between them that I can't see?
'hills without revolutionary' is the wordplay.
'hills' becomes 'tors' (tor is a kind of hill).
'without' is an insertion indicator ('without' can be similar in meaning to 'outside').
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'tors' enclosing 'che' is 'TORCHES'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for torches that I've seen before include "Hand-held lights" , "Portable lights or lamps" , "Sets on fire" , "Flashlights" , "Fires" .)