Students getting job after good result of degree in letters (5-5,4)
I believe the answer is:
first-class post
'students getting job after good result' is the definition.
I don't know anything about this answer so I can't tell whether this works.
'degree in letters' is the wordplay.
'degree' becomes 'first class' (first class is a kind of degree).
'in letters' becomes 'post' (letters in the mail or post. I am not sure about the 'in' bit.).
'firstclass'+'post'='FIRST-CLASS POST'
'of' is the link.
Can you help me to learn more?
(Another definition for first-class post that I've seen is " Fast mail service".)