America guaranteed to be plentiful (6)
I believe the answer is:
abound
'plentiful' is the definition.
(I've seen this before)
'america guaranteed' is the wordplay.
I cannot quite understand how this works, but
'america' could be 'a' (common abbreviation eg in USA) and 'a' is located in the answer.
The remaining letters 'bound' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'to be' is the link.
Can you help me to learn more?
(Other definitions for abound that I've seen before include "Be plentiful, swarm" , "flourish" , "Exist in large numbers" , "Exist in large quantities" , "grow on trees" .)