Teacher accepting thanks for something noteworthy (5)
I believe the answer is:
sitar
'something noteworthy' is the definition.
I can't tell whether this defines the answer.
'teacher accepting thanks' is the wordplay.
'teacher' becomes 'sir' (way of addressing a male teacher).
'accepting' indicates putting letters inside (inserted letters are accepted).
'thanks' becomes 'ta' (UK informal version of 'thank you').
'sir' placed around 'ta' is 'SITAR'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for sitar that I've seen before include "Indian stringed instrument" , "Indian string instrument" , "It takes pluck" , "Stringed instrument of the subcontinent" , "Large Indian lute" .)