Foreign aid model carries some fat (7)
I believe the answer is:
adipose
'some fat' is the definition.
(I've seen this before)
'foreign aid model carries' is the wordplay.
'foreign' is an anagram indicator (foreign order of the letters).
'model' becomes 'pose' (model can mean to pose).
'carries' is a charade indicator (letters next to each other) (in a down clue, some letters go beneath others).
'aid' is an anagram of 'adi'.
'adi'+'pose'='ADIPOSE'
(Other definitions for adipose that I've seen before include "Containing fat" , "Is a dope fat?" , "Relating to fat" , "Like a sort of fat" , "I soaped up with fatty kind of tissue" .)