Wait (4,2)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">wait</span>' is the definition.<br/ ><span class="explanation-format__explanation">(hanging on is a kind of waiting)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hang on that I've seen before include "Don't let go - wait a minute" , "Hold tight; wait" , "Don't let go - just a mo'" , "Wait a mo', or hold tightly in suspense" , "Hold the line" .)
(Another definition for amo that I've seen is " - - , amas, amat".)
(Another definition for bide ones time that I've seen is " Await a favourable moment".)