Maybe daisy cutter? (8)
I believe the answer is:
chainsaw
'cutter?' is the definition.
(I've seen this before)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for chainsaw that I've seen before include "Power tool" , "Timber cutter" , "powered device" , "Tree-lopper's tool" , "woodcutter?" .)