Outline in coarse pants (8)
I believe the answer is:
scenario
'outline' is the definition.
(I've seen this before)
'in coarse pants' is the wordplay.
'pants' is an anagram indicator (UK informal term for 'nonsense' or 'rubbish').
'in'+'coarse'='incoarse'
'incoarse' with letters rearranged gives 'SCENARIO'.
(Other definitions for scenario that I've seen before include "Outline or synopsis of a play" , "Outline of film, novel, etc" , "Written outline of a film, novel, or stage work" , "In plot of movie, for instance" , "Imagined situation" .)