Man from Lima in class (6)
I believe the answer is:
castle
'man' is the definition.
(castle is a kind of man)
'lima in class' is the wordplay.
'lima' becomes 'L' (phonetic alphabet: alpha, bravo, charlie etc.).
'in' means one lot of letters goes inside another.
'class' becomes 'caste' (caste is a kind of class).
'l' placed into 'caste' is 'CASTLE'.
'from' acts as a link.
(Other definitions for castle that I've seen before include "a piece in the corner" , "Big building" , "Move king to safety - stronghold" , "Fortified mansion" , "Citadel" .)