Composer, pious type, yellin' – by heavens! (10)
I believe the answer is:
stravinsky
'composer' is the definition.
(I know that Stravinsky is a composer)
'pious type yellin' by heavens' is the wordplay.
'pious type' becomes 'st' (saint).
'yellin'' becomes 'ravin' (I can't explain this - if you can you should give a lot more credence to this answer).
'by' means one lot of letters go next to another.
'heavens' becomes 'sky' (sky is a kind of heavens).
'st'+'ravin'+'sky'='STRAVINSKY'
Can you help me to learn more?
(Other definitions for stravinsky that I've seen before include "Igor __, "Firebird" composer" , "he noted" , "Russian composer" , "Igor -, Rite of Spring composer" , "Scorer" .)