Possible Clues:

• Different kinds of them are split (but not in an embarrassing way) in the four starred answers
• Acts like a hot dog
• Strokes embracing hem of satin knickers
• Rubbish underwear
• Porky Pig’s lack
• See 35-Down
• They're short of breath - so wearing!
• They're worn by the head of the household
• What you get from a hot dog is rubbish
• Short laboured intakes of breath