Answer: spellout

AnswerCrossword Clue
SPELLOUTDon't abbreviate
SPELLOUTClarify
SPELLOUTRead letter by letter.
SPELLOUTExplain fully.
SPELLOUTMake clear
SPELLOUTMake plain
SPELLOUTMake crystal-clear
SPELLOUTExplain in detail
SPELLOUTClearly explain addition in rant (5,3)