a word for medieval physician

You'll bet a better response if you tell us how many spaces need to be filled, and any letters which you have which you are confident are correct. It is, after all, a crossword.

You'd get a better response if you nominate the Magazine,puzzle name,clue number,andnumber of letters needed (with those you already worked out.)
That said,the answer is LEECH.

Good Luck

thanks for that that really helped me out

that said the answer could be laece

especially if the clue alludes to ancient or old