Apex domains cannot have CNAME records.
Question and response
Question
dig ghd-ie.org. NS
Answer
ghd-ie.org. 2 NS ns-42.awsdns-05.com.
ghd-ie.org. 2 NS ns-1547.awsdns-01.co.uk.
ghd-ie.org. 2 NS ns-1481.awsdns-57.org.
ghd-ie.org. 2 NS ns-939.awsdns-53.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0