Wasn't upstanding (6)
I believe the answer is:
leaned
'wasn't upstanding' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for leaned that I've seen before include "Listed" , "Sloped or rested against" , "Inclined, titled" , "Sloped, inclined" , "Inclined, tilted" .)