Traditional chorus in England, say, rendered around middle of July
I believe the answer is:
auld lang syne
'traditional chorus' is the definition.
'england say rendered around middle of july' is the wordplay.
'rendered' indicates an anagram.
'around' means one lot of letters goes inside another.
'middle of' indicates the central letters.
The central letters of 'july' are 'ul'.
'england'+'say'='englandsay'
'englandsay' with letters rearranged gives 'adlangsyne'.
'adlangsyne' placed around 'ul' is 'AULD LANG SYNE'.
'in' is the link.
(Other definitions for auld lang syne that I've seen before include "New Year's Eve favourite" , "New Year song" , "New Year's Eve ditty" , "Hogmanay song" , "Old times, especially remembered with affection" .)