Water finally swallowed by drier digger (6)
I believe the answer is:
trowel
'digger' is the definition.
(I've seen this before)
'water finally swallowed by drier' is the wordplay.
'water finally' becomes 'r' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'swallowed by' indicates putting letters inside.
'drier' becomes 'towel' (I've seen this before).
'r' inserted into 'towel' is 'TROWEL'.
Can you help me to learn more?
(Other definitions for trowel that I've seen before include "Hand tool for scooping or spreading" , "Platsterer's tool" , "Plastering tool" , "Potting tool" , "Small spade" .)