Ensign I teach holds Kindle (6)
I believe the answer is:
ignite
'kindle' is the definition.
(thesaurus)
'ensign i teach holds' is the wordplay.
'holds' says the answer is hidden in the clue.
'IGNITE' can be found hidden inside 'ensign i teach'.
(Other definitions for ignite that I've seen before include "Torch" , "Swan constellation" , "Detonate" , "Touch off; inflame" , "Kindle Fire" .)