Spells the end of nap in hectic campaign (5)
I believe the answer is:
magic
'spells' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for magic that I've seen before include "Wonderful" , "Witchcraft" , "Unexpectedly produce" , "Superb" , "Spelling?" .)