Only just - and not easily (6)
I believe the answer is:
hardly
'only just' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for hardly that I've seen before include "With great difficulty" , "Not quite "It seems unlikely!"" , "Barely, scarcely" , "Almost not" , "Not much" .)