Possible Clues:

• Take hold of, in a way
• To preoccupy magnificently, as with Robert Merrick
• Constantly worry (about something)
• Fixate on love -- Porgy's -- capturing heart of music
• Albatrosses both taking turn to incubate brood
• Funny looking bosses prey intrusively on the mind
• Constantly worry
• Think only huge doses ultimately contain deadly disease
• Be completely preoccupied
• Be fixated