Catch that's catchy? (4)
I believe the answer is:
hook
'catch' is the definition.
(hooking is a kind of catching)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for hook that I've seen before include "Peter Pan 1ac" , "Spit of land" , "13's pirate chief" , "Punch; fish catcher" , "One baited for fish" .)