And to us possibly it will seem surprising (7)

I believe the answer is:

astound

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'and to us possibly it will seem surprising' is the definition.
I can't judge whether this definition defines the answer.

'and to us possibly' is the wordplay.
'possibly' is an anagram indicator.
'and'+'to'+'us'='andtous'
'andtous' is an anagram of 'ASTOUND'.

Can you help me to learn more?

(Other definitions for astound that I've seen before include "Stagger" , "floor" , "Startle" , "Amaze, astonish" , "Stupefy" .)

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

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