clap for her
看怎么理解了,clap可以是及物也可以是不及物的
你可以看成是clap (hands) for her hands 省略了,拍肯定拍手了,就省了.
v.intr.（不及物动词）
To strike the palms of the hands together with a sudden explosive sound,as in applauding.
拍手,鼓掌：手掌拍击在一起并发出突然的爆响,如在喝彩中
To come together suddenly with a sharp sound.
欢呼：突然一起发出尖锐的声音
VT 及物动词
clapped hands in time to the music.
听音乐时恰时的鼓掌
To strike lightly but firmly with the open hand,as in greeting:
轻拍：用张开的手轻轻地但坚定地拍击,如在问候中：
clapped me on the shoulder.
轻拍我的肩膀