Chewsitover

1 clue
Thinks hard on a subject
Similar answers:
Charlestonchews
Chews
Chewsandaahs
Chewsat
Chewsitover
Chewsout
Chewsthefat
Chewsthescenery
Chewsup
Chewsupsides
Chewswisely
Circuitoverload
Dogchews
Doitover
Eschews
Eschewsthefat
Finkitover
Forkitoverbuddy
Forksitover
Getitoverwith