Upright piano in part of India misplaced (8)
I believe the answer is:
goalpost
'upright' is the definition.
(I know that goalpost is a type of post)
'piano in part of india misplaced' is the wordplay.
'piano' becomes 'p' (musical abbreviation).
'in' means one lot of letters goes inside another.
'part of india' becomes 'goa' (Goa is an Indian state).
'misplaced' becomes 'lost' (similar in meaning).
'goa'+'lost'='goalost'
'p' placed within 'goalost' is 'GOALPOST'.
(Other definitions for goalpost that I've seen before include "One propping up the bar" , "one unfairly moved" , "One of four supporters at ends of pitch" , "it's unfair to move" , "woodwork" .)