Vexation from German golfer lacking length (5)
I believe the answer is:
anger
'vexation from german' is the definition.
'anger' can be an answer for 'vexation' (I've seen this before). I am not certain of the 'from german' bit.
'golfer lacking length' is the wordplay.
'golfer' becomes 'langer' (Bernhard Langer).
'lacking' suggests deleting specific letters.
'length' becomes 'l' (abbreviation in geometry).
'langer' with 'l' removed is 'ANGER'.
Can you help me to learn more?
(Other definitions for anger that I've seen before include "One of the seven deadly sins" , "Emotion" , "Heat" , "Greatly annoy" , "blaze of this?" .)