Note poor performance and wilt (5)
I believe the answer is:
droop
'wilt' is the definition.
('droop' can be a synonym of 'wilt')
'note poor performance' is the wordplay.
'note' becomes 'd' (musical note).
'performance' indicates an anagram.
'poor' anagrammed gives 'roop'.
'd'+'roop'='DROOP'
'and' is the link.
(Other definitions for droop that I've seen before include "sink" , "Decline" , "Dangle" , "male problem?" , "Go limp" .)