how can i play soundclip by name?

Hello Community, i'd like to be able to play soundclips by their names, I have a script attatched to the GameObject having audiosource, one public array of clips , the elements are assigned in inspector, in the Start() method of script I'm adding elements to the Dictionary,` public Dictionary Clips;

 public Dictionary<string, AudioClip> Clips;
     
     void Start()
     {
         Clips = new Dictionary<string, AudioClip>();
         Clips.Add("Entry", clips[0]);
         Clips.Add("Reception", clips[1]);
         Clips.Add("Misc", clips[2]);
     }
  public void playbyname(string clipname)
     {
         AudioClip sound = new AudioClip();
         if(Clips.TryGetValue(clipname.ToString(),out sound))
         {
             gameObject.GetComponent<AudioSource>().PlayOneShot(sound);
         }
     }

when playbyname(string clipname) is called from script B such that GameObject.Find("Narrations").GetComponent().playbyname("Entry"); the line if(Clips.TryGetValue(clipname.ToString(),out sound)) throws a null reference exception, i'm not sure whether the array gets initialized before it's elements are added to the dictionary in Start() method. How do i sort it out?