Choosing to make a point with light heart (6)

I believe the answer is:

opting

'choosing' is the definition.
(I've seen this before)

'make a point with light heart' is the wordplay.
'make' is an anagram indicator.
'with' is a charade indicator (letters next to each other).
'heart' says to take the centre.
The middle letter of 'light' is 'g'.
'point' with letters rearranged gives 'optin'.
'optin'+'g'='OPTING'

'to' is the link.

(Another definition for opting that I've seen is " 'Choosing, plumping (6)'".)

I've seen this clue in the Evening Standard.

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