Prepare to fire male working at IKEA previously (4,3)

I believe the answer is:

take aim

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'prepare to fire' is the definition.
I can't tell whether this definition defines the answer.

'male working at ikea previously' is the wordplay.
'male' becomes 'm' (common abbreviation).
'working' indicates anagramming the letters.
'previously' means one lot of letters go next to another.
'at'+'ikea'='atikea'
'atikea' is an anagram of 'takeai'.
'm' put after 'takeai' is 'TAKE AIM'.

Can you help me to learn more?

(Other definitions for take aim that I've seen before include "Point a weapon at the target" , "Fire's said to follow this" , "Penultimate order for those shooting" , "Sight a target" , "train" .)

I've seen this clue in The Independent.

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