Great article, it’s free and you don’t have to pay for it (6)
I believe the answer is:
gratis
'you don't have to pay for it' is the definition.
I can't judge whether this defines the answer.
'great article it's free' is the wordplay.
'great' becomes 'gr'.
'article' becomes 'a' (indefinite article).
'free' indicates anagramming the letters.
'its' with letters rearranged gives 'tis'.
'gr'+'a'+'tis'='GRATIS'
'and' is the link.
Can you help me to learn more?
(Other definitions for gratis that I've seen before include "Free (Latin)" , "Without payment" , "Free, costs nothing" , "Free, at no cost" , "not charged" .)