Loses one’s figure but doesn’t let that stop one? (4,5)

'loses one's figure but doesn't' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'let that stop one?' is the wordplay.
I cannot quite see how this works, but
'let' could be 'get' (synonyms) and 'get' is found within the answer.
'one?' could be 'un' (northern English dialect form of 'one') and 'un' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?