How many letters does the top answer for “marked by or relating to or resulting from combination” have?

The most common answer is combinative (11 letters).

Crossword clue: marked by or relating to or resulting from combination

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

combinative 11 letters wn-def

marked by or relating to or resulting from combination

combinatory 11 letters wn-def

marked by or relating to or resulting from combination