The most common and most likely answer to this crossword clue is the 7 letter word RECRUIT
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More clues leading to the result RECRUIT
Buddy explains!

The straight part
We know that "New employee" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case new employee = recruit.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does RECRUIT mean?
RECRUIT noun- A supply of anything wasted or exhausted; a reinforcement.
- A person enlisted for service in the army; a newly enlisted soldier.
- A hired worker
- A new member of a certain population, usually a juvenile.
- To enroll or enlist new members or potential employees on behalf of an employer, organization, sports team, the military, etc.
- To supply with new men, as an army; to fill up or make up by enlistment; also, to muster
- To replenish, renew, or reinvigorate by fresh supplies; to remedy a lack or deficiency in.
- To recuperate; to gain health, flesh, spirits, or the like.
- To prompt a protein, leucocyte. etc. to intervene in a given region of the body.