The term 'Diminutive Spanish Suffix' refers to a set of suffixes used in the Spanish language to indicate smallness or endearment. The crossword solutions for this term are ULA (3 letters), ETTE (4 letters), LET (3 letters), ETTES (5 letters), and ITA (3 letters). ULA is a diminutive suffix used to indicate smallness, while ETTE and ETTES are used to indicate endearment. LET and ITA are also diminutive suffixes, but they are used less commonly than ULA and ETTE.