The most common and most likely answer to this crossword clue is the 3 letter word TON
T
O
N
More clues leading to the result TON
- Public school dismisses head for a lot of speed?
- Heavyweight beer cask, by the sound of it
- Heavyweight initially training cricket side
- Weight by no means going up
- Not so fast!
- Style of cryptic down clue?
- One hundred to an indefinite number
- Speed limit one partly ignored
- 100 against 24, essentially
- Century forward then?
Buddy explains!

The straight part
We know that "Heavyweight" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case heavyweight = ton.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 TON mean?
TON noun- A unit of weight (mass) equal to 2240 pounds (a long ton) or 2000 pounds (a short ton) or 1000 kilograms (a metric ton).
- A unit of volume; register ton.
- In refrigeration and air conditioning, a unit of thermal power defined as 12,000 BTU/h (about 3.514 kW or 3024 kcal/h), originally the rate of cooling provided by uniform isothermal melting of one short ton of ice per day at 32 °F (0 °C).
- A large amount.
- A speed of 100 mph.
- One hundred pounds sterling.
- One hundred runs.
- (etc.) One hundred points scored.
- Fashion, the current style, the vogue.
- Fashionable society; those in style.
- The common tunny, or horse mackerel.