Hand warmer, light and not too loud (7)
I believe the answer is:
muffled
'not too loud' is the definition.
(as in muffling a source of noise)
'hand warmer light' is the wordplay.
'hand warmer' becomes 'muff' (I've seen this in another clue).
'light' becomes 'led' (light-emitting diode).
'muff'+'led'='MUFFLED'
'and' acts as a link.
(Other definitions for muffled that I've seen before include "Wrapped for warmth" , "Of sound, deadened or made indistinct" , "Wrapped (up), stifled" , "Silenced; wrapped" .)