Like balls leaders of Greater London Labour spun (8)
I believe the answer is:
globular
'like balls leaders of greater london labour spun' is the definition.
I can't judge whether this definition defines the answer.
'leaders of greater london labour spun' is the wordplay.
'leaders of' suggests taking the first letters.
'spun' indicates an anagram.
The first letters of 'greater london' is 'gl'.
'labour' is an anagram of 'obular'.
'gl'+'obular'='GLOBULAR'
Can you help me to learn more?
(Other definitions for globular that I've seen before include "Shaped like drops of liquid" , "Shaped like a ball" , "Having the shape of a sphere" , "Spherical" .)