Henle

3 clues
German pathologist
Noted German pathologist: 1809-85
Loop of ___ (kidney part; anagram of HELEN)
Similar answers:
4wheel
Aachen
Aahed
Aahedat
Aasashes
Aattheopera
Aattheraces
Abandonedsheep
Abashed
Abashes
Abatoutofhell
Abcrunches
Abeliasherman
Abenchinthepark
Abidebytherules
Abirdinthehand
Abirdinthesand
Abitontheside
Abolished
Abolisher