Only just - and with difficulty (6)
I believe the answer is:
I believe this is a triple definition!
'only' is the first definition.
'just' is the second definition.
'and' acts as a link.
'with difficulty' is the third definition.
(I've seen this before)
(Other definitions for hardly that I've seen before include "Not much" , "Not quite "It seems unlikely!"" , "Barely, scarcely" , "Almost not" , "With great difficulty" .)