Double act performed in so detached a style (8)
I believe the answer is:
staccato
'detached a style' is the definition.
'staccato' can be an answer for 'detached' (I've seen this in another clue). I am unsure of the 'a style' bit.
'double act performed in so' is the wordplay.
'double' becomes 'tac' (I can't explain this - if you can you should believe this answer much more).
'performed' is an anagram indicator.
'in' indicates putting letters inside.
'act' is an anagram of 'cat'.
'tac'+'cat'='taccat'
'taccat' put inside 'so' is 'STACCATO'.
Can you help me to learn more?
(Other definitions for staccato that I've seen before include "(Musically) short and crisp" , "With sharply detached sounds (music)" , "Disconnected, like musical notes say" , "Disjointed, not smooth and flowing" , "not running smoothly" .)