Crushed oddly drab outhouse (6)
I believe the answer is:
dashed
'crushed' is the definition.
(thesaurus)
'oddly drab outhouse' is the wordplay.
'oddly' indicates alternate letters.
'outhouse' becomes 'shed' (I've seen this before).
The alternate letters of 'drab' are 'da'.
'da'+'shed'='DASHED'
(Other definitions for dashed that I've seen before include "Thrown down or ran fast" , "Threw down or ran fast" , "Jolly" , "Thrown down as hopes sometimes are" , "Frustrated" .)