"That was close!” (4)

I believe the answer is:
phew
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">that was close</span>' is the definition.<br/ ><span class="explanation-format__explanation">(both are said after narrowly avoiding danger)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for phew that I've seen before include "Gosh, that's a relief!" , "Gosh, I'm sweltering!" , "Exclamation of relief" , "Sound relieved" , "Good gracious, its hot!" .)