There may be little that's plain here (5,7)

'plain here' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'there may be little' is the wordplay.
I cannot really see how this works, but
'be' could be 'count' (counting is a kind of being) and 'count' is present in the answer.
'little' could be 'l' (abbreviation) and 'l' is found within the answer.
This may be the basis of the clue (or it may be nonsense).

'that's' is the link.

Can you help me to learn more?