Lots of rallies at this? Lenin wasn't involved (4,6)
I believe the answer is:
lawn tennis
'lots of rallies at this?' is the definition.
The definition suggests a singular noun which matches the answer.
'lenin wasn't involved' is the wordplay.
'involved' indicates an anagram (involved can mean confusing or complex).
'lenin'+'wasnt'='leninwasnt'
'leninwasnt' with letters rearranged gives 'LAWN TENNIS'.
Can you help me to learn more?
(Other definitions for lawn tennis that I've seen before include "Court game" , "court action results" , "sport" , "Wimbledon game" , "Real alternative" .)