The most common and most likely answer to this crossword clue is the 4 letter word LUMP
L
U
M
P
More clues leading to the result LUMP
- Liberal and Unionist revoke prime minister’s block
- Smoker approaches quiet mouse
- Pest eating this cake would get most fat
- Put up with ‘Sgt Pepper’, say, without hesitation
- Swallow helping of plum pudding
- Swelling fruit, soft from one end to the other
- Sign of growth heading off reversal of boom
- Stand for Labour against United-supporting MP
- Fat person out to group together
- Wedge of fruit from end to end
Buddy explains!

The straight part
We know that "Swallow" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case swallow = lump.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 LUMP mean?
LUMP noun- Something that protrudes, sticks out, or sticks together; a cluster or blob; a mound or mass of no particular shape.
- A group, set, or unit.
- A small, shaped mass of sugar, typically about a teaspoonful.
- A dull or lazy person.
- (as plural) A beating or verbal abuse.
- A projection beneath the breech end of a gun barrel.
- A kind of fish, the lumpsucker.
- Food given to a tramp to be eaten on the road.
- To treat as a single unit; to group together in a casual or chaotic manner (as if forming an ill-defined lump of the items).
- To bear a heavy or awkward burden; to carry something unwieldy from one place to another.
- To hit or strike (a person).