How many letters does the top answer for “relating to areas between the layers of the skin” have?

The most common answer is intracutaneous (14 letters).

Crossword clue: relating to areas between the layers of the skin

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

intracutaneous 14 letters wn-def

relating to areas between the layers of the skin

intradermal 11 letters wn-def

relating to areas between the layers of the skin