One unblemished after involving publicity team to produce publisher’s mark (7)
I believe the answer is:
imprint
'mark' is the definition.
(thesaurus)
'one unblemished after involving publicity' is the wordplay.
'one' becomes 'i' (Roman numeral).
'unblemished' becomes 'mint' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'after' is a charade indicator (letters next to each other).
'involving' indicates putting letters inside.
'publicity' becomes 'pr'.
'i'+'mint'='imint'
'imint' going around 'pr' is 'IMPRINT'.
'team to produce publisher's' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for imprint that I've seen before include "Impress, stamp" , "Publisher's name; stamp" , "make an impression" , "Mark made by pressing or stamping surface" , "Stamp; brand" .)