As an identifier, it has point (3)
I believe the answer is:
pin
'point' is the definition.
(thesaurus)
'as an identifier it' is the wordplay.
I cannot really understand how this works, but
'as' could be 'in' (I've seen this in other clues) and 'in' is found within the answer.
A single letter 'p' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'has' acts as a link.
Can you help me to learn more?
(Other definitions for pin that I've seen before include "Small brooch; skittle" , "Fastener; skittle" , "Fasten; a security code" , "Skittle; chess attack" , "Stick with flag placed in golf hole" .)