Hair or Toenail That Pierces the Skin
This page is the CodyCross answer for the clue below from Architectural Styles, Group 1177, Puzzle 5 (Buckingham Palace).
Question is: Hair or Toenail That Pierces the Skin
and the answer is: INGROWN
Word Meaning:
INGROWN — That has grown inwards or abnormally towards (a part of the body)
Definitions from Wiktionary.