if you are operating at a radar-equipped aerodrome, you could request a deconfliction service
Isn't a "deconfliction" service an ATSOCAS service and thus - by definition - only applicable OUTSIDE controlled airspace?
Within controlled airspace (D and up for VFR) you get whatever service the operator is required to give you under ICAO rules. I don't know if asking for a "deconfliction" service in class D is going to achieve what you think.