Works around opposing points of removable masses (7)
I believe the answer is:
tonsils
'removable masses' is the definition.
Although both the answer and definition are plural nouns, I don't see how one could define the other.
'works around opposing points' is the wordplay.
I cannot really understand how this works, but
'around' could be 'o' (a round letter) and 'o' is located in the answer.
'points' could be 'ns' (N is an example) and 'ns' is present in the answer.
The remaining letters 'tils' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' is the link.
Can you help me to learn more?
(Other definitions for tonsils that I've seen before include "Lost sin (anag.)" , "Glands in the throat" .)