Don't win the round, through being imprecise (5)

I believe the answer is:

loose

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

'don't win the round through' is the wordplay.
'don't win' becomes 'lose' (I've seen this before).
'the round' is an insertion indicator.
'through' becomes 'o' (I am not sure about this - if you are sure you should believe this answer much more).
'lose' enclosing 'o' is 'LOOSE'.

'being' is the link.

Can you help me to learn more?

(Other definitions for loose that I've seen before include "Not crammed" , "(Of a garment) a size too big?" , "Slack; not exact" , "Unleash" , "Unrestrained" .)

I've seen this clue in the Evening Standard.

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