Greet enthusiastically (4)
I believe the answer is:
hail
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">greet enthusiastically</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for hail that I've seen before include "Greet, call or salute" , "Greet(ing) - frozen shower" , "Welcome - cold shower" , "Hard Rain?" , "Fall of ice" .)