More aid (7)
I believe the answer is:
further
I believe this clue is a double definition.
'more' is the first definition.
(synonyms)
'aid' is the second definition.
(I've seen this in another clue)
(Other definitions for further that I've seen before include "To somewhere more advanced" , "In addition, also" , "Beyond; also" , "Moreover" , "To, or at, a greater extent, degree, or a more advanced stage" .)