It's essential to relocate some Latvians (5)

I believe the answer is:

vital

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'it's essential' is the definition.
(similar in meaning)

'relocate some latvians' is the wordplay.
'relocate' becomes 'vita' (I can't explain this - if you can you should believe this answer much more).
'some' indicates taking the first letters.
The first letter of 'latvians' is 'l'.
'vita'+'l'='VITAL'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for vital that I've seen before include "Highly important" , "Critical; life-sustaining" , "Essential for life; key" , "Critical, necessary" , "Extremely important, essential to success" .)

I've seen this clue in the Evening Standard.

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