Light linked to switch (6)

I believe the answer is:

kindle

'light' is the definition.
(thesaurus)

'linked to switch' is the wordplay.
'to switch' is an anagram indicator.
'linked' is an anagram of 'KINDLE'.

(Other definitions for kindle that I've seen before include "Modern book store" , "Cause to begin burning" , "Set of fire" , "Linked (anag)" , "E-book device" .)

I've seen this clue in The Telegraph and The Guardian.

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