It may have wings, but absolutely not power to rise (6)
I believe the answer is:
prison
'it may have wings' is the definition.
(prison buildings often have wings)
'absolutely not power to rise' is the wordplay.
'absolutely not' becomes 'no sir' (both can mean 'no way').
'power' becomes 'p' (symbol in physics).
'to rise' is a reversal indicator.
'nosir'+'p'='nosirp'
'nosirp' in reverse letter order is 'PRISON'.
'but' acts as a link.
(Other definitions for prison that I've seen before include "Place of detention for criminals" , "Slammer" , "Correctional institution" , "Stir - can" , "Clink - jug" .)