Iconic queen of Sultan ignored by first lieutenant (9)

I believe the answer is:

nefertiti

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

'iconic queen' is the definition.
'Nefertiti' can be an answer for 'queen' (I've seen this before). I'm not certain of the 'iconic' bit.

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for nefertiti that I've seen before include "Name of queen" , "old queen" , "Oddly, the Egyptian queen is an entire fit" , "Queen on the Nile" , "African Queen" .)

I've seen this clue in the Irish Times.

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