Joy English originally outlined in ancient language (7)
I believe the answer is:
elation
'joy' is the definition.
(elation is a kind of joy)
'english originally outlined in ancient language' is the wordplay.
'english' becomes 'e' (abbreviation).
'originally' says to take the initial letters.
'in' indicates putting letters inside.
'ancient language' becomes 'latin' (I've seen this before**).
The initial letter of 'outlined' is 'o'.
'o' going within 'latin' is 'lation'.
'e'+'lation'='ELATION'
(Other definitions for elation that I've seen before include "Delight, ecstasy" , "Feeling of delight or pride" , "Toenail (anag) -- delight" , "State of pleasure about toe-nail" , "There's great joy" .)