Animal one-piece papa slips into for tango (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

LEO T ARD (one-piece skintight garment worn by dancers, acrobats, etc, sleeveless or long-sleeved) with P (papa is the international radio communication code words for the letter P) replacing (slips into for) T (tango is the international radio communication code words for the letter T )