Deleting an AudioClip created by the microphone

Hey Unity, I need the script to delete the audio clip the microphone created after its played once, and I have no idea how to make it do that. Here is my script:

 using UnityEngine;
 using System.Collections;
 using System;
 
 public class MicrophoneInput_00 : MonoBehaviour {
     
     
     bool audioExists;
     
     float startTime; // declare this outside any function
 
     private MoraleManager_00 moraleManager;
 
     
     void Start() {
         foreach (string device in Microphone.devices) {
             Debug.Log("Name: " + device);
             audioExists = false;
             moraleManager = GameObject.FindGameObjectWithTag ("MoraleManager").GetComponent<MoraleManager_00>();
         
         }
     }
     
     void Update () {
         if (Input.GetKey("3")){
             // key pressed: save the current time
             AudioSource aud = GetComponent<AudioSource>();
             aud.clip = Microphone.Start("Samson C01U", false, 2, 44100);
             Debug.Log("recording!!!!");
             StartCoroutine(AudioCutOff());
             aud.Play();
             audioExists = true;
             moraleManager.increaseMorale(3f);
         }
         if (audioExists = true) {
 
         }
     }
     IEnumerator AudioCutOff() {
         yield return new WaitForSeconds(1.0f);
         audioExists = false;
     }
     
 }

Any help would be greatly appreciated!