Duck for us - maintaining standard in restaurant (3,7)

'restaurant' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'duck for us maintaining standard' is the wordplay.
'duck' becomes 'teal' (teal is a type of duck).
'for us' becomes 'our' (I've seen this in another clue).
'maintaining' means one lot of letters goes inside another.
'standard' becomes 'par' (standard of play in golf).
'teal'+'our'='tealour'
'tealour' placed around 'par' is 'TEA PARLOUR'.

'in' acts as a link.

Can you help me to learn more?