He owned a razor to scrape scalp hair smooth in seconds (5)
I believe the answer is:
occam
'he owned a razor to scrape scalp hair smooth in seconds' is the definition.
The definition suggests a singular noun which matches the answer.
'he' is the wordplay.
I cannot really understand how this works, but
'he' could be 'cam' and 'cam' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for occam that I've seen before include "One scientific principle is -'s razor" , "English philosopher, William (with a Razor!), d. 1349" , "___ 's razor - computer programming language" , "Oxford scholar" , "Man with razor" .)