Ink spot (4)
'ink spot' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for blot that I've seen before include "bad mark" , "Dark mark/stain" , "Ink stain; disgrace" , "Smudge (on escutcheon?)" , "Spot of ink, paint etc" .)
'ink spot?' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tat that I've seen before include "Bric-a-brac" , "Cheap junk" , "Worthless items" , "Tawdry or shabby articles" , "Tawdry stuff" .)