Apex domains cannot have CNAME records.
Question and response
Question
dig cleverreach.com. NS
Answer
cleverreach.com. 4 NS ns-722.awsdns-26.net.
cleverreach.com. 4 NS ns-465.awsdns-58.com.
cleverreach.com. 4 NS ns-2034.awsdns-62.co.uk.
cleverreach.com. 4 NS ns-1432.awsdns-51.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0