Certain European nations can give it new colours (3,9)

I believe the answer is:

low countries

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'certain european nations' is the definition.
The definition suggests a plural noun which matches the answer.

'give it new colours' is the wordplay.
'give' is an anagram indicator (I've seen 'giving' mean this (the letters give the letters for another word)).
'it'+'new'+'colours'='itnewcolours'
'itnewcolours' with letters rearranged gives 'LOW COUNTRIES'.

'can' is the link.

Can you help me to learn more?

I've seen this clue in The Irish News.

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