Beloved as earth to Spooner, that's obvious (5,2,3)

'obvious' is the definition.
(I know that obvious can be written as clear as day)

'beloved as earth to spooner' is the wordplay.
I cannot really understand how this works, but
'as' is within the answer.
'earth' could be 'e' and 'e' is present in the answer.
This may be the basis of the clue (or it may be nonsense).

'that's' acts as a link.