Related Clues:

• 'Psst!'
• Belong
• 'Psst!' follower, perhaps
• ''Is it cold --- or is it just me?''
• Weirdo
• Be essential (to)
• Possible answer to "Where are you?"
• Be a natural part
• Naturally belong
• Answer to 'Where are you?'
• Possible answer to ''Where are you?''
• ''Psst!'' follower, perhaps
• Hider's whisper, perhaps
• Response from another room
• '___ on My Own' ('Fame' song)