Can time add colour? (4)

I believe the answer is:

tint

I'm a little stuck... Click here to teach me more about this clue!

'colour?' is the definition.
(tint is a kind of colour)

'can time' is the wordplay.
'can' becomes 'tin' (synonyms).
'time' becomes 't' (abbreviation).
'tin'+'t'='TINT'

'add' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for tint that I've seen before include "A slight shade of colour" , "A slighth shade of colour" , "Hair dye" , "'Shade, tone (4)'" , "Shade; colour slightly" .)

I've seen this clue in the Sydney Morning Herald.

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