Relating to morning at sea in Malta (7)

I believe the answer is:

matinal

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'relating to morning' is the definition.
I can't judge whether this definition defines the answer.

'at sea in malta' is the wordplay.
'at sea' is an anagram indicator.
'in'+'malta'='inmalta'
'inmalta' anagrammed gives 'MATINAL'.

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(Another definition for matinal that I've seen is " of morning prayer".)

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

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