In college, something for acting Head of English Language (6)
I believe the answer is:
creole
'language' is the definition.
(creole is a kind of language)
'in college something for acting head of english' is the wordplay.
'in' means one lot of letters goes inside another.
'college' becomes 'c'.
'something for acting' becomes 'role'.
'head of' indicates taking the first letters.
The initial letter of 'english' is 'e'.
'c'+'role'='crole'
'crole' enclosing 'e' is 'CREOLE'.
(Other definitions for creole that I've seen before include "White descendant of French ancestors as in New Orleans" , "A language mix" , "Language mixture" , "Louisiana cuisine" , "Person of mixed descent" .)