To get drenched is unusual in more ways than one (6)
I believe the answer is:
sodden
'more ways than one' is the definition.
I can't judge whether this defines the answer.
'to get drenched is unusual' is the wordplay.
'to get' becomes 'sen' (I can't justify this - if you can you should give a lot more credence to this answer).
'drenched' is an insertion indicator.
'is unusual' becomes 'odd' (similar in meaning).
'sen' enclosing 'odd' is 'SODDEN'.
'in' is the link.
Can you help me to learn more?
(Other definitions for sodden that I've seen before include "Muddy" , "Soaked to the skin" , "Soaking wet" , "Drenched through, really wet" , "heavy with moisture" .)