What does the cryptic crossword clue "Oversees Len on shift getting to become timid (4,4,5)" mean?

The wordplay uses an anagram. anagram of OVERSEES + LEN + ON = LOSEONESNERVE The answer is LOSEONESNERVE.

Oversees Len on shift getting to become timid (4,4,5)

Daily Mail Cryptic #17483 | 19 Across | 2024-11-06 flower