Spike: I don't have a tan (6)
I believe the answer is:
impale
'spike' is the definition.
(I know that spike can be written as impale)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for impale that I've seen before include "spit!" , "Kill by piercing with a spear or sharp pole" , "Spike" , "Pierce through as with sharp stick" , "Kill by piercing with a sharp stake" .)