"Pokémon" protagonist Ketchum (3)
I believe the answer is:
ash
'pokemon protagonist ketchum' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for ash that I've seen before include "Burnt remains; tree" , "Burnt material; tree" , "End of fire" , "Tree with pale wood" , "at village near Whitchurch in Shropshire" .)