Get bagatelle, having shifted item of furniture (7,5)

I believe the answer is:

gateleg table

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'get bagatelle' is the definition.
I can't judge whether this definition defines the answer.

'shifted item of furniture' is the wordplay.
'shifted' becomes 'gateleg' (I can't justify this - if you can you should believe this answer much more).
'item of furniture' becomes 'table' (table is a type of furniture item).
'gateleg'+'table'='GATELEG TABLE'

'having' acts as a link.

Can you help me to learn more?

I've seen this clue in The Times.

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