In abrupt style, points out a dodgy dud (6)
I believe the answer is:
sudden
'in abrupt' is the definition.
'sudden' can be an answer for 'abrupt' (similar in meaning). I am not sure about 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' (two compass points).
'out' indicates putting letters inside.
'a dodgy' is an anagram indicator (a dodgy or wrong order of 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" .)