He can put the pitch right (5)
I believe the answer is:
tuner
'he can put' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'pitch right' is the wordplay.
'pitch' becomes 'tune' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'right' becomes 'r' (common abbreviation).
'tune'+'r'='TUNER'
'the' is the link.
Can you help me to learn more?
(Other definitions for tuner that I've seen before include "Motor specialist" , "Radio adjuster" , "Radio receiver" , "piano man?" , "Piano adjuster" .)