One bad thing is to get a broken leg (6)

I believe the answer is:

single

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'one' is the definition.
(similar in meaning)

'bad thing is to get a broken leg' is the wordplay.
'bad thing' becomes 'sin' (I am not sure about this - if you are sure you should believe this answer much more).
'is to get' indicates putting letters inside.
'a broken' is an anagram indicator.
'leg' with letters rearranged gives 'gle'.
'sin' placed within 'gle' is 'SINGLE'.

Can you help me to learn more?

(Other definitions for single that I've seen before include "Unattached" , "Sort of person" , "Only one; record" , "Individual - unmarried" , "Free" .)

I've seen this clue in the Evening Standard.

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