Everybody showing close affection - that's quite comprehensive (3-9)
I believe the answer is:
all-embracing
'comprehensive' is the definition.
(thesaurus)
'everybody showing close affection that's quite' is the wordplay.
I cannot really understand how this works, but
'everybody' could be 'all' (all people) and 'all' is located in the answer.
The remaining letters 'embracing' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for all-embracing that I've seen before include "Encompassing everything" , "Comprehensive" .)