Constant quality (7)

I believe the answer is:

loyalty

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'constant quality' is the definition.
'loyalty' can be an answer for 'quality' (loyalty is a kind of quality). I'm unsure of the 'constant' bit.

'constant quality' is the wordplay.
'constant' becomes 'loyal'.
'quality' becomes 'ty' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'loyal'+'ty'='LOYALTY'

Can you help me to learn more?

(Other definitions for loyalty that I've seen before include "Faithfully allegiance" , "Strong allegiance" , "Dedication" , "Firm allegiance" , "Fidelity, allegiance" .)

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

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