Hector's switched lights (7)
I believe the answer is:
torches
'lights' is the definition.
(I know this)
'hector's switched' is the wordplay.
'switched' is an anagram indicator (letters switch places).
'hectors' anagrammed gives 'TORCHES'.
(Other definitions for torches that I've seen before include "Fires" , "Sets on fire" , "Hand-held lights" , "Portable lights or lamps" , "Sets alight" .)