Ample opportunity? Hardly (3,6)
I believe the answer is:
fat chance
'hardly' is the definition.
I don't know anything about this answer so I can't judge whether this works.
'ample opportunity?' is the wordplay.
'ample' becomes 'fat' (I can't explain this - if you can you should give a lot more credence to this answer).
'opportunity?' becomes 'chance' ('chance' can be a synonym of 'opportunity').
'fat'+'chance'='FAT CHANCE'
Can you help me to learn more?
(Other definitions for fat chance that I've seen before include "Little prospect" , "No likelihood at all!" , "Slender hope (odd though that sounds)" , "Slim hope, paradoxically!" , "It will never happen!" .)