Briefly describe reversal of formation in rugby (4-3)
I believe the answer is:
line-out
'formation in rugby' is the definition.
The definition suggests a singular noun which matches the answer.
'briefly describe reversal of' is the wordplay.
I cannot really understand how this works, but
'describe' could be 'line' (synonyms) and 'line' is found within the answer.
'of' could be 'o' and 'o' is found in the answer.
The remaining letters 'ut' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for line-out that I've seen before include "Method of restarting play in rugby" , "Set piece of play in rugby" , "Outline for a rugby formation" , "RU throw-in" , "A rugby formation to receive throw-in" .)