Crossword Genius

Sibling avoiding second disturbance (6)

Ross

I believe the answer is:

bother

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

'disturbance' is the definition.
(I know that bother is a type of disturbance)

'sibling avoiding second' is the wordplay.
I cannot quite see how this works, but
'second' could be 'other' (I've seen this before) and 'other' is located in the answer.
A single letter 'b' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for bother that I've seen before include "Hassle - drat!" , "Take the trouble to do something" , "Worry, upset (someone)" , "Discommode, annoy" , "Fuss; oh no!" .)

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