Eels can swim to get clear of dirt (7)
I believe the answer is:
cleanse
'clear of dirt' is the definition.
'cleanse' can be an answer for 'clear' (thesaurus). I'm unsure of the 'of dirt' bit.
'eels can swim' is the wordplay.
'swim' indicates an anagram.
'eels'+'can'='eelscan'
'eelscan' is an anagram of 'CLEANSE'.
'to get' is the link.
Can you help me to learn more?
(Other definitions for cleanse that I've seen before include "Make thoroughly clean" , "Disinfect" , "Bathe" , "Wash" , "subject to purification" .)