Actor's reportedly regal house, rural one on river (7,7)
'actor's' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'reportedly regal house rural one on river' is the wordplay.
I cannot quite see how this works, but
'reportedly' could be 'e' (I've seen this in other clues) and 'e' is present in the answer.
'one' could be 'an' (I've seen this in other clues) and 'an' is found within the answer.
'river' could be 'r' and 'r' is present in the answer.
'on' could be 'at' (I've seen this in other clues) and 'at' is present in the leftover letters.
This explanation may well be incorrect...
Can you help me to learn more?