Complete section of boxing match gets cancelled (5,3)
I believe the answer is:
round off
'complete' is the definition.
The definition and answer can be both related to change as well as being verbs in their base form.
Perhaps they are linked in a way I don't understand?
'section of boxing match gets cancelled' is the wordplay.
'section of boxing match' becomes 'round' (I can't justify this - if you can you should believe this answer much more).
'gets' means one lot of letters go next to another.
'cancelled' becomes 'off' (similar in meaning).
'round'+'off'='ROUND OFF'
Can you help me to learn more?
(Other definitions for round off that I've seen before include "finish" , "Conclude" .)