手代 is read as てだい (tedai) and means sales clerk.
てだい
tedai
てあし
hands and feet
てぬぐい
(hand) towel
て
ability to cope
てまえ
tea-ceremony procedures
てづくり
handmade
てま
time
てほん
model handwriting
てがみ
letter
てもと
grip
ていれ
(police) raid
てわけ
division of labour
てじな
magic (illusion)