Registered my rare order to tie knot again (7)

I believe the answer is:

remarry

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'tie knot again' is the definition.
I can't judge whether this defines the answer.

'registered my rare order' is the wordplay.
'registered' becomes 'R' (abbreviation, as in registered trademark).
'order' indicates anagramming the letters.
'my'+'rare'='myrare'
'myrare' is an anagram of 'emarry'.
'r'+'emarry'='REMARRY'

'to' is the link.

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(Another definition for remarry that I've seen is " Wed again".)

I've seen this clue in The Daily Express.

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