Thus a ruler gets very wet (7)
I believe the answer is:
'very wet' is the definition.
'soaking' can be an answer for 'wet' (I've seen this before). I'm not certain of the 'very' bit.
'thus a ruler' is the wordplay.
'thus' becomes 'so' (synonyms).
'ruler' becomes 'king' (king is a kind of ruler).
'gets' is the link.
Can you help me to learn more?
(Other definitions for soaking that I've seen before include "Wet" , "Drenched" .)