Somewhat Conservative name Left must expel (3)

I believe the answer is:
wet
'somewhat conservative' is the definition.
Both the answer and definition are adjectives. Perhaps you can see a link between them that I can't see?
'name left must expel' is the wordplay.
'name' becomes 'n' (common abbreviation e.g. on forms).
'left' becomes 'went' (left can mean went away).
'must expel' indicates named letters should be taken away.
'went' with 'n' removed is 'WET'.
Can you help me to learn more?
(Other definitions for wet that I've seen before include "Rainy; feeble person" , "Rainy (weather)" , "Saturated with liquid" , "Moderately Conservative" , "Moist or Soaked" .)
