Crossword Genius

Small parasitic arachnid (4)

Ross

I believe the answer is:

tick

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">small parasitic arachnid</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 tick that I've seen before include "Parasite, moment (colloq.)" , "Moment; bloodsucker" , "Parasitic insect or pillow casing" , "Credit; clock sound" , "Minute" .)

I've seen this clue in the Irish Times (Simplex).
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