Spaniard possibly with choice of exits? (5)

I believe the answer is:

diego

I'm a little stuck... Click here to teach me more about this clue!

'spaniard' is the definition.
(common Spanish name)

I don't understand how the remainder of the clue works.

(Other definitions for diego that I've seen before include "- Rivera, twentieth century Mexican painter" , "San --, -- Garcia" , "-- Garcia, Indian Ocean island" , "Spanish name" , "Spaniard potentially" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app