It's lovely having our egg so addled (8)
I believe the answer is:
gorgeous
'it's lovely' is the definition.
(I've seen this before)
'our egg so addled' is the wordplay.
'addled' indicates an anagram.
'our'+'egg'+'so'='oureggso'
'oureggso' is an anagram of 'GORGEOUS'.
'having' is the link.
(Other definitions for gorgeous that I've seen before include "Lovely" , "Wonderful to taste or look at" , "Stunning" , "Extremely beautiful" , "Sumptuously beautiful" .)