Shortly put - play a 5th above what it would have been in the bass clef. If the note is a C when you read it in the bass clef, play the G above that C.

If you have a note or a passage written in the tenor clef, you can first play it as if it’s in the bass clef. Remove a sharp when you do that, and if there are no sharps, add a flat. Then, play it again but a 5th up - one string up.

You can play up on the D string in order to easily switch over to the A string.

Or, take the notes as if they are in the bass clef, take them 1 octave down, then 1 string up, and at last 1 octave up again.

If you’re stuck, please reach out to me with the music in question, and I’ll do my best to help you!