20 across
Indication
to
remove
awful
clue,
not
easy
to
see
(9)
Indication to remove awful clue, not easy to see (9)
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The definition is at the end of the clue.
How the clue works
Not easy to see is your definition — something tiny. MINUS gets you the "indication to remove" part (think subtraction), and then tack on CULE, which is an anagram of CLUE — that's your "awful clue" doing the work at the end.