farewell gift
餞 centers on a gift given at parting: a farewell present or token of goodbye.
餞 combines 飠 (food) with 戔, which likely contributes the sound セン. The idea is a farewell feast or gift of food given to a departing person.
The left side 飠 is food, and the right side 戔 looks like stacked boxes. Imagine packing a farewell gift of food into boxes for someone leaving.
For セン, picture sending off a friend with a farewell gift: send -> セン, and the food radical 飠 reminds you it's a parting gift.