Italian astronomer (7)
I believe the answer is:
galileo
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">italian astronomer</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 galileo that I've seen before include "Pioneer scientist" , "Italian astronomer who had trouble with church" , "It. C 16 to 17 astronomer" , "Great Italian astronomer, a founder of modern science" , "Refracting telescope inventor" .)