Father getting own back in Scotland with order (7)

I believe the answer is:

sirenia

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'order' is the definition.
(Sirenia is an example)

'father getting own back' is the wordplay.
'father' becomes 'sire' (synonyms).
'getting' means one lot of letters go next to another.
'own' becomes 'ain' (synonyms).
'back' shows that the letters should be reversed in order.
'ain' reversed gives 'nia'.
'sire'+'nia'='SIRENIA'

'in scotland with' acts as a link.
This may not be right. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Another definition for sirenia that I've seen is " Aquatic mammals".)

I've seen this clue in the Sydney Morning Herald.

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