Boys may have a run on them; darners renew them (7)
I believe the answer is:
errands
'boys' is the definition.
Although both the answer and definition are plural nouns, I can't understand how they can define each other.
'have a run on them darners renew them' is the wordplay.
'darners' can be anagrammed to 'ERRANDS'.
However, I am not clear how this is indicated.
'may' acts as a link.
Can you help me to learn more?
(Other definitions for errands that I've seen before include "Missions" , "Trips to carry out tasks" , "Task-oriented trips" , "Darners (anag.)" , "Delivery journeys" .)