Little marsupial nourished and covered (6)
I believe the answer is:
roofed
'covered' is the definition.
(roofing is a kind of covering)
'little marsupial nourished and' is the wordplay.
'little' means to remove the last letter (the word is not quite complete).
'marsupial' becomes 'roo' (short for kangaroo).
'nourished' becomes 'fed' (I've seen this in another clue).
'and' becomes 'n' (common abbreviation for 'and').
'roo'+'fed'+'n'='roofedn'
'roofedn' with its last letter removed is 'ROOFED'.
(Other definitions for roofed that I've seen before include "(Of house) covered" , "shelter" .)