The most common and most likely answer to this crossword clue is the 6 letter word FITTER
I've seen this crossword clue in The Daily Telegraph
F
I
T
T
E
R
More clues leading to the result FITTER
Buddy explains!
The straight part
We know that "Better trained/mechanic" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case better trained/mechanic = fitter.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 FITTER mean?
FITTER adjective- Suitable, proper.
- Adapted to a purpose or environment.
- In good shape; physically well.
- Sexually attractive; good-looking; fanciable.
- Prepared; ready.
- A person who fits or assembles something.
- An epileptic.
- A coal broker who conducts the sales between the owner of a coal pit and the shipper.
- A person employed to find suitable music to accompany silent films.