What does the cryptic crossword clue "Pick this up at home, not the morgue, unusually (6,6)" mean?

The wordplay uses an anagram. anagram of NOT + THE + MORGUE, = MOTHERTONGUE The answer is MOTHERTONGUE.

Pick this up at home, not the morgue, unusually (6,6)

Daily Mail Cryptic #16532 | 29 Across | 2021-03-15 flower