Be as good as and rise as high as (4,2,2)
I believe the answer is:
come up to
'be' is the definition.
Although both the answer and definition are verbs in their base form, I don't see how they can define each other.
'good as and rise as high as' is the wordplay.
I cannot quite understand how this works, but
'rise' could be 'comeup' (synonyms) and 'comeup' is found within the answer.
The remaining letters 'to' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'as' acts as a link.
Can you help me to learn more?
(Other definitions for come up to that I've seen before include "Match" , "near" .)