Crossword Genius

Sauce required for formal dinner (8)

Ross

I believe the answer is:

dressing

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'sauce' is the definition.
(I know that dressing is a type of sauce)

'formal dinner' is the wordplay.
'formal' becomes 'dress' (similar in meaning).
'dinner' becomes 'ing' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'dress'+'ing'='DRESSING'

'required for' is the link.

Can you help me to learn more?

(Other definitions for dressing that I've seen before include "clothing" , "Sauce for salads" , "Sauce - protection for wound" , "plaster, for example?" , "Sauce - alignment - bandage" .)

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