Bugger study — it's very wet (6)
I believe the answer is:
sodden
'very wet' is the definition.
'bugger study' is the wordplay.
'bugger' becomes 'sod'.
'study' becomes 'den' (I've seen this before).
'sod'+'den'='SODDEN'
'it's' is the link.
(Other definitions for sodden that I've seen before include "Waterlogged" , "Made very wet" , "Drenched, really soaked" , "Totally saturated" , "Soaked to the skin" .)