HQ Russia built shaped approximately like a block (8)

I believe the answer is:

squarish

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'shaped approximately like a block' is the definition.
I can't judge whether this defines the answer.

'hq russia built' is the wordplay.
'built' indicates an anagram.
'hq'+'russia'='hqrussia'
'hqrussia' anagrammed gives 'SQUARISH'.

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(Another definition for squarish that I've seen is " Quite regular".)

I've seen this clue in The Independent.

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