If "clinical" means "relating to a clinic or hospital":
* Medical
* Hospital
* Healthcare
* Therapeutic
If "clinical" means "impersonal and unemotional":
* Objective
* Detached
* Impartial
* Neutral
* Dispassionate
* Cold
If "clinical" means "relating to the observation and treatment of patients":
* Medical
* Therapeutic
* Diagnostic
* Practitioner
* Empirical
If "clinical" means "relating to a condition that is not serious":
* Mild
* Minor
* Subclinical
* Asymptomatic
To give you the best word to substitute "clinical," please provide me with the sentence or context in which you are using the word.