Toed line by yielding thus? (10)

I believe the answer is:

obediently

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'thus?' is the definition.
Both the answer and definition are adverbs. Maybe there's a link between them I don't understand?

'toed line by yielding' is the wordplay.
'yielding' is an anagram indicator.
'toed'+'line'+'by'='toedlineby'
'toedlineby' with letters rearranged gives 'OBEDIENTLY'.

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