It sounds like you need to keep her on a leash in the situation when and continue practicing on leash until the recall behavior becomes more fluent. Also, make sure you are using a “high value” treat for “come” such as hot dogs, cheese, cooked chicken. Remember to take baby steps, if you go too fast, you could set her up for failure. Slow and steady wins the race!

If you want to use the clicker as a cue to come you can so you can say “come” or whistle then click and treat when she comes to you.