Hamlet, say, heard to condescend (5)
I believe the answer is:
deign
'condescend' is the definition.
('deign' can be a synonym of 'condescend')
'hamlet say heard' is the wordplay.
'hamlet say' becomes 'dane' (Hamlet is Prince of Denmark).
'heard' indicates a 'sounds like' (homophone) clue.
'dane' is a homophone of 'DEIGN'.
'to' is the link.
(Other definitions for deign that I've seen before include "Seem supercilious" , "Do something considered to be below one's dignity" , "Think fit" , "consent" , "See fit" .)