Depend merely on me being away (4)

I believe the answer is:

rely

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

'depend' is the definition.
(to depend on someone is to rely on them)

'merely on me being away' is the wordplay.
'RELY' is hidden within the letters.
However, I am not sure how this is indicated.

Can you help me to learn more?

(Other definitions for rely that I've seen before include "Depend (upon)" , "All the letters" , "Depend, bank" , "Count" , "City with cathedral" .)

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