She goes deep under water, right inside, to find a golf club (6)
I believe the answer is:
driver
'a golf club' is the definition.
(I know that Driver is a type of Wood)
'she goes deep under water right inside' is the wordplay.
I cannot really see how this works, but
'water' could be 'river' (river is a kind of water) and 'river' is located in the answer.
A single letter 'd' remains which might be clued in a way I don't see.
This explanation may well be incorrect...
'to find' acts as a link.
Can you help me to learn more?
(Other definitions for driver that I've seen before include "Motorist - golf club" , "Type of golf club" , "Operator of a motor vehicle" , "Golf club; chauffeur" , "Member of RAC" .)