Edgy investigator meets agent with delicate material on tablet's ingredients - it's priceless (13)
I believe the answer is:
irreplaceable
'priceless' is the definition.
(thesaurus)
'edgy investigator meets agent with delicate material on tablet's ingredients' is the wordplay.
I cannot really understand how this works, but
'agent' could be 'rep' (short for representative) and 'rep' is located in the answer.
'material' could be 'lace' (lace is a kind of material) and 'lace' is present in the answer.
'tablet' could be 'e' (E can mean ecstasy or an ecstasy tablet) and 'e' is present in the answer.
This explanation may well be incorrect...
'it's' is the link.
Can you help me to learn more?
(Other definitions for irreplaceable that I've seen before include "Unique" , "Without possible substitute" , "precious!" , "Cannot be substituted" , "Whose loss cannot be made good" .)