Barney ties gendarme up (12)

I believe the answer is:

disagreement

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'barney' is the definition.
Both the definition and answer are singular nouns.
Perhaps you can see a link between them that I can't see?

'ties gendarme up' is the wordplay.
'up' indicates anagramming the letters (letters get chucked up).
'ties'+'gendarme'='tiesgendarme'
'tiesgendarme' anagrammed gives 'DISAGREEMENT'.

Can you help me to learn more?

(Other definitions for disagreement that I've seen before include "Argument" , "dispute" , "Difference of opinion" , "Quarrel" , "Conflict" .)

I've seen this clue in The Independent.

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