Maybe a song about the heart of England is wildly chanted (6)
I believe the answer is:
slogan
'is wildly chanted' is the definition.
I can't tell whether this definition defines the answer.
'maybe a song about the heart of england' is the wordplay.
'maybe' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'the heart of' means to look at the middle letters.
The central letter of 'england' is 'l'.
'a'+'song'='asong'
'asong' with letters rearranged gives 'sogan'.
'sogan' going around 'l' is 'SLOGAN'.
Can you help me to learn more?
(Other definitions for slogan that I've seen before include "Shibboleth" , "Catchy phrase in advertisement etc" , "Memorable advertising phrase" , "short political statement" , "'Motto, watchword (6)'" .)