Lying about person in office not getting elected (9)
I believe the answer is:
recumbent
'lying' is the definition.
(I've seen this before)
'about person in office not getting elected' is the wordplay.
'about' becomes 're' (regarding**).
'person in office' becomes 'incumbent' (I've seen this before).
'not getting' is a deletion indicator.
'elected' becomes 'in'.
'incumbent' with 'in' taken out is 'cumbent'.
're'+'cumbent'='RECUMBENT'
(Other definitions for recumbent that I've seen before include "flat?" , "Lying down comfortably" .)