Clue: Entertainer turning up at party, initially with tower of presents (3,6)
Answer: TAP DANCER
Explanation: Definition: Entertainer
A charade of TA, a reversal ('turning up', in a down light) of 'at' plus P ('**P**arty initially') plus DANCER (Dasher, Dancer, Prancer, Vixen etc. 'tower of presents')