Possible Clues:

• Really or truly, e.g.: Abbr.
• Tom Swifty wd.
• Truly, madly or deeply: Abbr.
• H.S. mentor
• -ly word, e.g.: Abbr.
• "Idiotically," for ex.
• It modifies a v.
• TV spot
• Thesaurus abbr.
• Purely or simply: Abbr.