Did he organise the break up of the USSR? (4)

I believe the answer is:

russ

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'did he organise the break up' is the definition.
The definition suggests a singular noun which matches the answer.

'of the ussr?' is the wordplay.
'of' indicates anagramming the letters (the answer comes from or 'of' the letters).
'ussr' with letters rearranged gives 'RUSS'.

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(Other definitions for russ that I've seen before include "-- Abbot, comedian, actor" , "Maybe Tchaikovsky" .)

I've seen this clue in the Evening Standard.

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