Moderation seen when lacking a fashion allowance (6)

I believe the answer is:

ration

I'm a little stuck... Click here to teach me more about this clue!

'allowance' is the definition.
(I've seen this before)

'moderation seen when lacking a fashion' is the wordplay.
'RATION' is hidden in amongst the letters.
But, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for ration that I've seen before include "Restrict the supply of" , "Wartime allowance?" , "A fixed quantity allowed to one person in times of scarcity" , "Restricted share" , "Limit, share" .)

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

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