Cheep (5)
I believe the answer is:
chirp
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cheep</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that cheep can be written as chirp)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for chirp that I've seen before include "Make sound like grasshopper" , "Grasshopper's noise" , "Twitter" , "Fledgling's sound" , "Short sharp tone of grasshopper" .)