Possible Clues:

• For the 30 across one gets fat around a toe turned up
• Do alter for acrobat's garment
• End up in fat gymnast's garment
• Dancer's body suit
• Love sailor in light costume
• Ballet-class wear
• One-piece garment worn by acrobat
• Skintight suit
• What to put on sign - sailor started to doubt
• Garment used eg in ballet or yoga