Light touch or push (5)
I believe the answer is:
nudge
I believe this clue is a double definition.
'light touch' is the first definition.
(I've seen this before)
'push' is the second definition.
(I know this)
(Other definitions for nudge that I've seen before include "Jog" , "Push (with a wink?)" , "Facility of pinball machine" , "Festive entertainment" , "Remind (with the elbow?)" .)