Crossword Genius

A searcher online gets more annoying (9)

Ross

I believe the answer is:

bothering

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

'annoying' is the definition.
('bother' can be a synonym of 'annoy')

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Another definition for bothering that I've seen is " Aggravating in night-robe".)

I've seen this clue in The Daily Express.
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