
1) Comparing card game 2) Fan of a singing show 3) French word used in English 4) Super Friends character 5) To make a joke 6) Trick-taking card game
Found on
https://www.crosswordclues.com/clue/gleek
[Super Friends] Gleek is a fictional character appearing in the animated series Super Friends and its related spinoffs. He debuted in The All-New Super Friends Hour, which first aired September 10, 1977. Gleek`s vocalizations were provided by Michael Bell who also voiced Zan. ==Fictional character biography== Gleek is a blue `space monkey` ...
Found on
http://en.wikipedia.org/wiki/Gleek_(Super_Friends)

a trick or joke
Found on
http://phrontistery.info/g.html

• (n.) A game at cards, once popular, played by three persons. • (v. i.) To make sport; to gibe; to sneer; to spend time idly. • (n.) An enticing look or glance. • (n.) Three of the same cards held in the same hand; -- hence, three of anything. • (n.) A jest or scoff; a trick or deception.
Found on
http://thinkexist.com/dictionary/meaning/gleek/
Gleek intransitive verb To make sport; to gibe; to sneer; to spend time idly. [ Obsolete]
Shak. Found on
http://www.encyclo.co.uk/webster/G/32
Gleek noun [ Prob. from Icelandic
leika to play, play a trick on, with the prefix
ge- ; akin to Anglo-Saxon
gelācan , Swedish
leka to play, Danish
lege .]
1. A jest or scoff; a trick or deception. [ Obsolete] « Where's the Bastard's braves, and ...
Found on
http://www.encyclo.co.uk/webster/G/32

Gleek, also known as cleek, is a three player card game that was popular in England in the 16th and 17th centuries.
Found on
http://www.probertencyclopaedia.com/browse/OG.HTM

to make a joke; jest.
Found on
https://www.infoplease.com/dictionary/gleek
No exact match found.