Possible Clues:

• Avoided being found
• Placed so as not to be found
• Concealed (oneself?)
• Withheld
• Listened as a seeker counted down, say
• With 34-, 36- and 37-Across, ulterior motive ... or a hint to the word concealed in each starred clue's answer
• Holed up from stardom
• Camouflaged, say
• Ducked the seeker, in a game
• Prepared for a surprise party, in a way