Crossword Genius

Possibly sole importance is to get thinner (4,6)

Ross

I believe the answer is:

lose weight

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

'possibly sole importance' is the wordplay.
'possibly' indicates an anagram.
'importance' becomes 'weight' (weight is a kind of importance).
'sole' anagrammed gives 'lose'.
'lose'+'weight'='LOSE WEIGHT'

'is' is the link.

Can you help me to learn more?

I've seen this clue in The Independent.
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