Spike with a bent point (5)
I believe the answer is:
piton
'spike' is the definition.
(I know that piton is a type of spike)
'bent point' is the wordplay.
'bent' is an anagram indicator.
'point' is an anagram of 'PITON'.
'with a' is the link.
(Other definitions for piton that I've seen before include "Metal spike used in rock climbing" , "something used when climbing" , "Peg driven into rock in mountain climbing" , "Mountaineering tool" , "Spiked climbing aid" .)