Dodgy coins ref used for evidence in court (8)
I believe the answer is:
forensic
'evidence in court' is the definition.
'forensic' can be an answer for 'evidence' (I have seen 'Such evidence' mean 'forensic' so perhaps 'evidence' could also mean 'forensic'). I am not certain of the 'in court' bit.
'dodgy coins ref' is the wordplay.
'dodgy' indicates an anagram (a dodgy or wrong order of the letters).
'coins'+'ref'='coinsref'
'coinsref' anagrammed gives 'FORENSIC'.
'used for' is the link.
Can you help me to learn more?
(Other definitions for forensic that I've seen before include "Branch of medicine dealing with the law" , "Relating to the application of scientific methods in criminal investigation" , "Conifers (anag)" , "Used in lawcourts, like conifers" , "Using science to investigate crime" .)