No way for solid opportunity (3,6)
I believe the answer is:
fat chance
'no way' is the definition.
(thesaurus)
'solid opportunity' is the wordplay.
'solid' becomes 'fat'.
'opportunity' becomes 'chance' ('chance' can be a synonym of 'opportunity').
'fat'+'chance'='FAT CHANCE'
'for' is the link.
(Other definitions for fat chance that I've seen before include "Little prospect" , "that won't happen" , "It will never happen!" , "Slender hope (odd though that sounds)" , "Slim hope, paradoxically!" .)