Make it wet, study current passing through (6)
I believe the answer is:
dampen
'make it wet' is the definition.
I can't judge whether this definition defines the answer.
'study current passing through' is the wordplay.
'study' becomes 'den' (term for a study or office).
'current' becomes 'amp' (electricity).
'passing through' indicates putting letters inside.
'den' placed around 'amp' is 'DAMPEN'.
Can you help me to learn more?
(Other definitions for dampen that I've seen before include "Make moist or subdued" , "Make moist or depress spirit" , "Make moist or depress spirits" , "Moisten" , "Make moist or depressed" .)