Crossword Genius

Deliver article to top or bottom level (5)

Ross

I believe the answer is:

nadir

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

'bottom level' is the definition.
'nadir' can be an answer for 'bottom' (I've seen this in another clue). I am not certain of the 'level' bit.

'deliver article to top or' is the wordplay.
'deliver article' becomes 'nadi' (I can't explain this - if you can you should give a lot more credence to this answer).
'to top' means to remove the first letter.
'or' with its first letter taken off is 'r'.
'nadi'+'r'='NADIR'

Can you help me to learn more?

(Other definitions for nadir that I've seen before include "worst-case scenario?" , "Lower one cannot get!" , "extremely low position" , "Drain (anag)" , "pits" .)

I've seen this clue in The Times.
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