Crossword Genius

Speciality has canned fish on a roll (9)

Ross

I believe the answer is:

fortunate

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

'on a roll' is the definition.
I can't tell whether this defines the answer.

'speciality has canned fish' is the wordplay.
'speciality' becomes 'forte' (I've seen this before).
'has' indicates putting letters inside.
'canned fish' becomes 'tuna' (I've seen this in another clue).
'forte' placed around 'tuna' is 'FORTUNATE'.

Can you help me to learn more?

(Other definitions for fortunate that I've seen before include "Lucky" , "Blessed with good luck" .)

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