Dawn French article boring English teacher's turned up (7)
I believe the answer is:
sunrise
'dawn' is the definition.
(synonyms)
'french article boring english teacher's turned up' is the wordplay.
'french article' becomes 'un' (indefinite article in French).
'boring' indicates putting letters inside (to bore something can mean to drill into it).
'english' becomes 'E' (abbreviation).
'teacher's' becomes 'sir's' (way of addressing a male teacher).
'turned up' shows that the letters should be reversed in order.
'e'+'sirs'='esirs'
'esirs' back-to-front is 'srise'.
'un' put within 'srise' is 'SUNRISE'.
(Other definitions for sunrise that I've seen before include "Tequila --, cocktail" , "Daybreak" , "It's preceded by dawn" , "What follows dawn" , "Type of industry" .)