Piano runs are frustrating in Chopin piece? (7)
I believe the answer is:
prelude
'chopin piece?' is the definition.
(I've seen this in another clue)
'piano runs are frustrating' is the wordplay.
'piano' becomes 'p' (musical abbreviation).
'runs' becomes 'r' (cricket abbreviation).
'are frustrating' becomes 'elude' (I can't justify this - if you can you should give a lot more credence to this answer).
'p'+'r'+'elude'='PRELUDE'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for prelude that I've seen before include "Overture" , "Preamble" , "Opening piece" , "Introductory piece of music" , "Introductory part, say of poem" .)