Little ones may have no rims (6)
I believe the answer is:
minors
'little ones may' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how one could define the other.
'no rims' is the wordplay.
'no rims' can be anagrammed to 'MINORS'.
But, I'm not clear how this is indicated.
'have' acts as a link.
Can you help me to learn more?
(Other definitions for minors that I've seen before include "Young people" , "They are legally under-age" , "They're too young to vote" , "could be little ones" , "They're under-age" .)