On the podium if not after flipping, gymnastic star gets medal, finally (7)

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

for the definition, a rostrum can be a podium, so ‘rostral’ can describe something with a connection to a podium OR=”if not” reversed/”after flipping”; plus anagram/”gymnastic” of (star)*, plus final letter of [meda]-L