In abrupt style, points out a dodgy dud (6)

I believe the answer is:

sudden

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'in abrupt' is the definition.
'sudden' can be an answer for 'abrupt' ('sudden' can be similar in meaning to 'abrupt'). I am not certain of the 'in' bit.

'style points out a dodgy dud' is the wordplay.
'style' becomes 's' (this could be a standard abbreviation of which I'm unaware).
'points' becomes 'en'.
'out' is an insertion indicator.
'a dodgy' indicates anagramming the letters.
's'+'en'='sen'
'dud' with letters rearranged gives 'udd'.
'sen' going around 'udd' is 'SUDDEN'.

Can you help me to learn more?

(Other definitions for sudden that I've seen before include "Quick and unexpected" , "Done unexpectedly" , "Immediate and surprising" , "Happening abruptly" , "Abrupt, unexpected" .)

I've seen this clue in the Evening Standard.

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