Projects worth millions finally abandoned (6)
I believe the answer is:
throws
'projects' is the definition.
('throw' can be a synonym of 'project')
'worth millions finally abandoned' is the wordplay.
'finally' suggests the final letters.
'abandoned' indicates an anagram.
The final letter of 'millions' is 's'.
'worth'+'s'='worths'
'worths' is an anagram of 'THROWS'.
(Other definitions for throws that I've seen before include "Casts or hurls" , "Hurls, flings" , "Chucks" , "Propels through the air" .)