Player with a high-pitched voice? (5)
I believe the answer is:
piper
'player' is the definition.
(I know that piper is a type of player)
'with a high-pitched voice?' is the wordplay.
'with' means one lot of letters goes inside another.
'a high' suggests taking the first letters (I've seen 'highest of' mean this (top letter - down clues only)).
'voice?' becomes 'pier' (I am not sure about this - if you are sure you should believe this answer much more).
The initial letter of 'pitched' is 'p'.
'p' inserted within 'pier' is 'PIPER'.
Can you help me to learn more?
(Other definitions for piper that I've seen before include "Bagpipes player" , "John --, 20th century English artist" , "See 21" , "Military musician" , "oil and gas field" .)