Joint investment in bank ledger (5)

I believe the answer is:

ankle

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'joint investment' is the definition.
'ankle' can be an answer for 'joint' (joint of the body). I am unsure of the 'investment' bit.

'in bank ledger' is the wordplay.
'in' indicates a hidden word.
'ANKLE' is hidden within 'bank ledger'.

Can you help me to learn more?

(Other definitions for ankle that I've seen before include "Foot-leg connector" , "Major joint in lower limb" , "Leg-joint" , "Bone over foot" , "Low joint" .)

I've seen this clue in The Guardian.

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