Recommend (strongly) (4)
I believe the answer is:
urge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">recommend strongly</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for urge that I've seen before include "Encourage to go on, goad" , "Implore" , "Strongly recommend; impulse" , "Advise earnestly, spur" , "Strong impulse, desire" .)