This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
鱁 combines 魚 (fish) with 逐 (pursue, chase). The exact historical development is uncertain, but it likely originally referred to a type of fish or a fish-related concept.
A fish 魚 being chased 逐: imagine a rare fish that is always on the move, making its meaning elusive.
For チク, picture a cheeky fish that always escapes: cheek -> チク, and the fish is chased but never caught.