Crossword Genius

Diss gap in letter order from Barbara Woodhouse? (5)

Ross

I believe the answer is:

musit

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'diss gap' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'letter order from barbara woodhouse?' is the wordplay.
'letter' becomes 'mu' (mu is a kind of letter).
'order from barbara woodhouse?' becomes 'sit' (I can't explain this - if you can you should believe this answer much more).
'mu'+'sit'='MUSIT'

'in' acts as a link.

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I've seen this clue in The Times.
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