Expert in courses on engineering (11)
I believe the answer is:
connoisseur
'expert' is the definition.
(I know that Connoisseur is a type of expert)
'in courses on engineering' is the wordplay.
'engineering' indicates an anagram (letters manipulated or engineered).
'in'+'courses'+'on'='incourseson'
'incourseson' with letters rearranged gives 'CONNOISSEUR'.
(Other definitions for connoisseur that I've seen before include "Knowledgeable art-lover" , "discriminating judge" , "Expert judge of taste" .)