Insecure kind left holding light again (8)
I believe the answer is:
rekindle
'light again' is the definition.
(I've seen this in another clue)
'insecure kind left holding' is the wordplay.
'holding' indicates the answer is hidden within the clue.
'REKINDLE' is hidden within 'insecure kind left'.
(Other definitions for rekindle that I've seen before include "Cause to burn again" , "Light (a fire) again" , "Revive (something lost)" , "Cause to start burning again" , "Get the fire going again" .)