Peer saw kid maltreated? Polish maestro? (10)
I believe the answer is:
paderewski
'polish maestro?' is the definition.
The definition suggests a singular noun which matches the answer.
'peer saw kid maltreated?' is the wordplay.
'maltreated?' is an anagram indicator.
'peer'+'saw'+'kid'='peersawkid'
'peersawkid' is an anagram of 'PADEREWSKI'.
Can you help me to learn more?
(Other definitions for paderewski that I've seen before include "Pianist who became prime minister of Poland" , "in Polish politics" , "Pianist who became Poland's prime minister in 1919" , "Former key player" , "Polish pianist and politician" .)