Pitch right into a clue, beginning to yield so soon? (7)
I believe the answer is:
already
'so soon?' is the definition.
(already can mean sooner than expected)
'pitch right into a clue beginning to yield' is the wordplay.
'pitch right' becomes 'r' (I can't explain this - if you can you should believe this answer much more).
'into' means one lot of letters goes inside another.
'clue' becomes 'lead' (e.g. in a police investigation).
'beginning to' suggests taking the first letters.
The first letter of 'yield' is 'y'.
'a'+'lead'='alead'
'r' put inside 'alead' is 'alread'.
'alread'+'y'='ALREADY'
Can you help me to learn more?
(Other definitions for already that I've seen before include "Indication of impatience (US)" , "thus far" , "Even this soon" , "earlier than might have been expected" , "By the time in question" .)