He made history at the seaside (6)

I believe the answer is:

canute

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'he made history at the seaside' is the definition.
The definition suggests a singular noun which matches the answer.

This is the entire clue.

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(Other definitions for canute that I've seen before include "Ancient king who ordered the waves to retreat" , "King of England, Denmark and Norway" , "Ancient King who commanded the tide to retreat" , "Sea-defying king of England" , "The king who thought he could stop the tide" .)

I've seen this clue in the Evening Standard.

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