Having shed pounds the girl dances (7)

I believe the answer is:

lighter

I'm a little stuck... Click here to teach me more about this clue!

'having shed pounds' is the definition.
I can't tell whether this defines the answer.

'the girl dances' is the wordplay.
'dances' indicates an anagram.
'the'+'girl'='thegirl'
'thegirl' is an anagram of 'LIGHTER'.

Can you help me to learn more?

(Other definitions for lighter that I've seen before include "Barge (more likely to float?)" , "Vessel" , "Cargo barge; smoker's accessory" , "Fire-raiser" , "Open boat - spill" .)

I've seen this clue in The Sun.

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