Rough cut is subsequently given a couple of notes (7)
I believe the answer is:
inexact
'rough' is the definition.
(similar in meaning)
'cut is subsequently given a couple of notes' is the wordplay.
'cut' means to remove the last letter.
'subsequently' becomes 'next' (I've seen this in another clue).
'given' indicates putting letters inside.
'a couple of notes' becomes 'ac' (I am not sure about this - if you are sure you should believe this answer much more).
'is' with its final letter taken off is 'i'.
'next' enclosing 'ac' is 'nexact'.
'i'+'nexact'='INEXACT'
Can you help me to learn more?
(Other definitions for inexact that I've seen before include "Lax" , "Not precise, approximate" , "Imprecise - inaccurate in" , "Rough" , "not wholly Right" .)