Having a diploma might give one a nice title (10)
I believe the answer is:
licentiate
'having a diploma' is the definition.
I can't tell whether this definition defines the answer.
'might give one a nice title' is the wordplay.
'might' is an anagram indicator (I've seen this in other clues).
'give' says to put letters next to each other.
'one' becomes 'a' (a thing is one thing).
'a'+'nice'='anice'
'anice'+'title' is 'anicetitle'.
'anicetitle' with letters rearranged gives 'LICENTIATE'.
Can you help me to learn more?
(Other definitions for licentiate that I've seen before include "Qualified professional" , "Certificate of competence holder" .)