Who could replace print I tore apart? (8,7)

I believe the answer is:

portrait painter

'who' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'replace print i tore apart?' is the wordplay.
'replace' indicates anagramming the letters (I've seen 'replaced' mean this).
'print'+'i'+'tore'+'apart'='printitoreapart'
'printitoreapart' anagrammed gives 'PORTRAIT-PAINTER'.

'could' is the link.

(Another definition for portrait painter that I've seen is " Artist".)

I've seen this clue in The Guardian.

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