Look out for midwives in a bar (5)

I believe the answer is:

lever

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'a bar' is the definition.
(lever is a kind of bar)

'look out for midwives' is the wordplay.
'look' becomes 'la' (I've seen this in other clues).
'out' means to remove the last letter.
'for midwives' becomes 'ever' (I can't explain this - if you can you should give a lot more credence to this answer).
'la' with its final letter taken away is 'l'.
'l'+'ever'='LEVER'

'in' acts as a link.

Can you help me to learn more?

(Other definitions for lever that I've seen before include "Exert pressure" , "Prise using bar" , "Means of exerting force" , "Bar turning on a fulcrum" , "Revel in lifting bar" .)

I've seen this clue in the Evening Standard.

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