Court study that's somewhat dull (6)
I believe the answer is:
wooden
'somewhat dull' is the definition.
'wooden' can be an answer for 'dull' (I've seen this before). I'm not sure about the 'somewhat' bit.
'court study' is the wordplay.
'court' becomes 'woo' (both can mean to romance someone).
'study' becomes 'den' (term for a study or office).
'woo'+'den'='WOODEN'
'that's' is the link.
Can you help me to learn more?
(Other definitions for wooden that I've seen before include "Monotonous like timber" , "E.g. made of oak" , "Unconvincing (of a stage performance) - made of oak?" , "Awkward, like a tree?" , "acting poorly?" .)