Choristers were storming Elgar's home (14)
I believe the answer is:
worcestershire
'elgar's home' is the definition.
I can't judge whether this definition defines the answer.
'choristers were storming' is the wordplay.
'storming' is an anagram indicator (I've seen 'storm' mean this).
'choristers'+'were'='choristerswere'
'choristerswere' is an anagram of 'WORCESTERSHIRE'.
Can you help me to learn more?
(Other definitions for worcestershire that I've seen before include "where triennial choir festival staged?" , "saucy locale?" , "English county" .)