The most common and most likely answer to this crossword clue is the 3 letter word HEN
H
E
N
More clues leading to the result HEN
- Layer often found in batteries?
- The nest is home to this bird
- Egg supplier hoteliers employed naturally at first
- She supplies eggs and ham every night, for starters
- Composed of women, at that time lacking leader
- Bird subsequently losing head
- Not cock of the north
- Scot's pet after losing weight
- Finishes off with single green layer
- Male ‘n’ female
Buddy explains!

The straight part
We know that "Layer often found in batteries?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case layer often found in batteries? = hen.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 HEN mean?
HEN noun- A female chicken (Gallus gallus), particularly a sexually mature one kept for its eggs.
- A female of other bird species, particularly a sexually mature female fowl.
- A female fish (especially a salmon or trout) or crustacean.
- A woman, particularly
- A hen night.
- An affectionate term of address used to women or girls.
- A henlike person of either sex.
- The hard clam (Mercenaria mercenaria), a bivalve shellfish.
- To behave in an overprotective or extremely nurturing manner (towards).
- Hence.
- To throw.