Radiotelephony response (5)
I believe the answer is:
wilco
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">radiotelephony response</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for wilco that I've seen before include "Roger might be followed by this" , "expression of agreement" , "Term of agreement (in radio communication)" , "Radio comms expression of compliance" , "it indicated acquiescence" .)