Difficult to catch Elvis when travelling in Europe (7)
I believe the answer is:
elusive
'difficult to catch' is the definition.
(I've seen this in another clue)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for elusive that I've seen before include "Use veil to be difficult to catch" , "Evil use (anag.)" , "Hard to grasp" , "Vile sue is hard to catch" , "Hard to pin down, slippery" .)