1) Clean fish 2) Remove 3) Remove the contents of 4) Take 5) Take away 6) To disembowel 7) To eviscerate 8) Withdraw 
to disembowel
• (v. t.) To take out the bowels or entrails of; to disembowel; to eviscerate; as, exenterated fishes.
Ex·en'ter·ate transitive verb [ Latin exenteratus , past participle of exenterare ; confer Greek ...; ... out + ... intestine.] To take out the bowels or entrails of; to disembowel; to eviscerate; as, exenterated fishes. [ R.] « Exenterated rule-mongers and eviscerat...
[v] - medicine: remove the contents of (an organ)
verb remove the contents of (an organ)