Crossword Genius

A collectable dog one comes to love (5)

Ross

I believe the answer is:

curio

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'a collectable' is the definition.
I can't judge whether this definition defines the answer.

'dog one comes to love' is the wordplay.
'dog' becomes 'cur' (both can mean a despicable person).
'one' becomes 'i' (Roman numeral).
'comes to' says to put letters next to each other.
'love' becomes 'o' (love means zero in tennis).
'cur'+'i'+'o'='CURIO'

Can you help me to learn more?

(Other definitions for curio that I've seen before include "Something unusual, perhaps worthy of collecting" , "Unusual object, oddity" , "Interesting object of rarity or difference" , "Intriguing object worth collecting" , "odd thing" .)

I've seen this clue in the Evening Standard.
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