Conceit of English turn (3)
I believe the answer is:
ego
'conceit' is the definition.
(I've seen this before)
'english turn' is the wordplay.
'english' becomes 'e' (abbreviation).
'turn' becomes 'go' (a person's move in a board game).
'e'+'go'='EGO'
'of' is the link.
(Other definitions for ego that I've seen before include "Personal pride" , "(Self-assertive) personality" , "Consciousness" , "Aspect of the personality" , "Self-confidence" .)