Sing in French first and delight one (7)
I believe the answer is:
enchant
'delight one' is the definition.
'enchant' can be an answer for 'delight' (enchant can mean to charm or delight). I am unsure of the 'one' bit.
'sing in french first' is the wordplay.
'sing' becomes 'chant' (chanting is a kind of singing).
'in french' becomes 'en' ('in' in French).
'first' says to put letters next to each other.
'chant' after 'en' is 'ENCHANT'.
'and' is the link.
Can you help me to learn more?
(Other definitions for enchant that I've seen before include "Fascinate - delight" , "Hypnotise" , "Bewitch, charm" , "Delight, charm" , "Captivate, charm" .)