It helps to lift weight around the fireplace (7)

I believe the answer is:

winglet

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'it helps to lift' is the definition.
The definition suggests a singular noun which matches the answer.

'weight around the fireplace' is the wordplay.
'weight' becomes 'wt'.
'around' is an insertion indicator.
'the fireplace' becomes 'ingle' (I've seen this before).
'wt' going around 'ingle' is 'WINGLET'.

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I've seen this clue in the Sydney Morning Herald.

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