Crossword Genius

Absolutely certain it's a photographic term (8)

Ross

I believe the answer is:

positive

I believe this is a double definition.

'absolutely certain' is the first definition.
(I've seen this in another clue)

'a photographic term' is the second definition.
(as opposed to a photographic negative)

'it's' acts as a link.

(Other definitions for positive that I've seen before include "Optimistic; certain" , "Confident, very sure" , "Definite, sure" , "Definite, confident" , "Of a number, greater than zero - that's certain" .)

I've seen this clue in The Globe and Mail.
Want a hint initially instead of a full solution? Install my app