One of those known to make five? (4)
I believe the answer is:
bean
'make five?' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'one of those known' is the wordplay.
I cannot really see how this works, but
'one' could be 'an' (an apple is one apple) and 'an' is located in the answer.
The remaining letters 'be' 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' acts as a link.
Can you help me to learn more?
(Other definitions for bean that I've seen before include "Haricot or runner?" , "Broad, French or kidney?" , "kept by the counter?" , "Fava, kidney or mung, say" , "Vegetable, could be green or broad" .)