Crossword Genius

Bank where diver goes in, short of energy? (6)

Ross

I believe the answer is:

depend

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

'bank' is the definition.
(I've seen this in another clue)

'diver goes in short of energy?' is the wordplay.
I cannot quite see how this works, but
'energy?' could be 'pe' (P.E. is an example) and 'pe' is located in the answer.
This explanation may well be incorrect...

'where' is the link.

Can you help me to learn more?

(Other definitions for depend that I've seen before include "Rely or hang on" , "Dangle - rely" , "Count on or hang from" , "Rely (upon)" , "Trust confidently, rely on" .)

I've seen this clue in The Daily Mail.
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