Delights in all the exclamations of surprise about it (7)
I believe the answer is:
wallows
'delights' is the definition.
Although both the answer and definition are verbs in their -s form, I cannot understand how they can define each other.
'all the exclamations of surprise about it' is the wordplay.
'the exclamations of surprise' becomes 'wows' (I can't justify this - if you can you should believe this answer much more).
'about it' indicates putting letters inside (some letters go around or about others).
'all' placed inside 'wows' is 'WALLOWS'.
'in' is the link.
Can you help me to learn more?
(Another definition for wallows that I've seen is " Rolls in water like swallow".)