Apex domains cannot have CNAME records.
Question and response
Question
dig sycaminepartners.com. NS
Answer
sycaminepartners.com. 5 NS ns-752.awsdns-30.net.
sycaminepartners.com. 5 NS ns-238.awsdns-29.com.
sycaminepartners.com. 5 NS ns-1711.awsdns-21.co.uk.
sycaminepartners.com. 5 NS ns-1276.awsdns-31.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0