Forces in trouble describing crime scene investigation (8)
I believe the answer is:
forensic
'crime scene investigation' is the definition.
I can't judge whether this definition defines the answer.
'forces in trouble' is the wordplay.
'trouble' is an anagram indicator.
'forces'+'in'='forcesin'
'forcesin' with letters rearranged gives 'FORENSIC'.
'describing' is the link.
Can you help me to learn more?
(Other definitions for forensic that I've seen before include "adapted to argument" , "Used in law courts, like conifers" , "related to criminal investigation" , "Of or used in law courts, as in medicine" , "Relating to investigative science" .)