Articles covering rent in jumper, say (7)
I believe the answer is:
athlete
'jumper say' is the definition.
(I know that jumper is a type of athlete)
'articles covering rent' is the wordplay.
'articles' becomes 'a the' ('a' and 'the', indefinite and definite articles).
'covering' means one lot of letters goes inside another.
'rent' becomes 'let' (I've seen this in another clue).
'athe' placed around 'let' is 'ATHLETE'.
'in' acts as a link.
(Other definitions for athlete that I've seen before include "gymnast, maybe" , "Sprinter, say" , "Announces impending danger" , "Sporty type" , "One trained to compete in sports" .)