Don’t start stupid song about Shakespeare’s country (7)
I believe the answer is:
illyria
'shakespeare's country' is the definition.
(setting of Shakespeare's Twelfth Night)
'don't start stupid song' is the wordplay.
'don't start' means to remove the first letter.
'stupid' becomes 'silly' (I've seen this before).
'song' becomes 'ria' (I am not sure about this - if you are sure you should believe this answer much more).
'silly' with its first letter taken away is 'illy'.
'illy'+'ria'='ILLYRIA'
'about' is the link.
(Other definitions for illyria that I've seen before include "Roman Adriatic province" , "Ancient region of Adriatic coast, setting for Twelfth Night" , "Ancient Adriatic region, scene of "Twelfth Night"" , "setting at start of Twelfth Night" , "Orsino's place" .)