Diamonds I repeatedly show a Spaniard (5)
I believe the answer is:
diego
'a spaniard' is the definition.
(common Spanish name)
'diamonds i repeatedly' is the wordplay.
'i repeatedly' means two replacements for 'i'.
'diamonds' becomes 'd' (abbreviation for the card suit diamonds).
'i' becomes 'ego' ('I' in Latin).
'd'+'i'+'ego'='DIEGO'
'show' acts as a link.
(Other definitions for diego that I've seen before include "Maradona, say" , "Maradona, Argentine footballer" , "Spanish name" , "- Rivera, twentieth century Mexican painter" , "Spaniard potentially" .)