Crossword clue: a gelatinous compound of linseed oil and mastic varnish, used by artists as a vehicle for colors.

The most common answer is megilp (6 letters).

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

Possible answers

megilp 6 letters web-def

a medium for oil-paints; linseed oil mixed with mastic varnish or turpentine

megilph 7 letters web-def

A gelatinous compound of linseed oil and mastic varnish, used by artists as a vehicle for colors. [Written also magilp,