In addition, no worse (2,4)
I believe the answer is:
as well
'in addition' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for as well that I've seen before include "To boot" , "with equal effect" , "Appropriate" , "Also, additionally" , "Also, in addition" .)