Comedian entertaining family is stimulating (6)
I believe the answer is:
waking
'stimulating' is the definition.
Both the answer and definition are adjectives. Maybe you can see an association between them that I can't see?
'comedian entertaining family' is the wordplay.
'comedian' becomes 'wag' (I've seen this before).
'entertaining' means one lot of letters goes inside another.
'family' becomes 'kin' (synonyms).
'wag' going around 'kin' is 'WAKING'.
'is' is the link.
Can you help me to learn more?
(Other definitions for waking that I've seen before include "getting aroused" , "Stirring, coming to life" , "prelude to rising" , "Emerging from sleep" , "conscious hours" .)