Can add to part of the poem (5)

I believe the answer is:

canto

'part of the poem' is the definition.
('canto' is part of 'poem')

'can add to' is the wordplay.
'add' says to put letters next to each other.
'can'+'to'='CANTO'

(Other definitions for canto that I've seen before include "verse" , "Poetic piece" , "Musical part" , "Main division of long poem" , "Major division of a long poem" .)

I've seen this clue in The Globe and Mail.

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