Actors taking English class (5)
I believe the answer is:
caste
'class' is the definition.
(caste is a kind of class)
'actors taking english' is the wordplay.
'actors' becomes 'cast' (I've seen this before).
'taking' is a charade indicator (letters next to each other).
'english' becomes 'e' (abbreviation).
'cast'+'e'='CASTE'
(Other definitions for caste that I've seen before include "Social station" , "Level in society" , "Social status" , "Hereditary social class among Hindus" , "Hindu social rank" .)