Little kid picked up strength (5)

I believe the answer is:

might

I'm a little stuck... Click here to teach me more about this clue!

'strength' is the definition.
(I know that might is a type of strength)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for might that I've seen before include "Capability" , "Clout" , "intensity of feeling" , "Great power/strength" , "Strength - could possibly" .)

I've seen this clue in The Independent.

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