Everyday charge of simplest kind in heraldry (8)

I believe the answer is:

ordinary

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This could be a double definition.

'everyday' is the first definition.
(similar in meaning)

'charge of simplest kind in heraldry' is the second definition.
'ordinary' can be an answer for 'heraldry' (ordinary is a kind of heraldry). I'm not sure about the 'charge of simplest kind in' bit.

Can you help me to learn more?

(Other definitions for ordinary that I've seen before include "Common" , "Unremarkable" , "standard" , "Unexceptional, quite usual" , "Not exceptional in any way" .)

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

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