Purpose: to line up one's target (3)

I believe the answer is:

aim

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I believe this is a triple definition!

'purpose' is the first definition.
(synonyms)

'to line up' is the second definition.

'one's target' is the third definition.
'aim' can be an answer for 'target' (synonyms). I am unsure of the 'one's' bit.

Can you help me to learn more?

(Other definitions for aim that I've seen before include "Purpose, intention" , "Purpose in directing the rifle" , "Try to achieve" , "Focus on target" , "End" .)

I've seen this clue in the Sydney Morning Herald.

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