Ignorant of tune lacking intro about a conflict (7)
I believe the answer is:
unaware
'ignorant of' is the definition.
(not aware of something)
'tune lacking intro about a conflict' is the wordplay.
'lacking intro' means to remove the first letter (the word's introduction is removed).
'about' means one lot of letters goes inside another.
'conflict' becomes 'war' (war is a kind of conflict).
'tune' with its first letter removed is 'une'.
'a'+'war'='awar'
'une' placed around 'awar' is 'UNAWARE'.
(Other definitions for unaware that I've seen before include "Without knowledge" , "Ignorant - unenlightened" , "Totally ignorant" , "Not realising" , "Uninformed" .)