The most common and most likely answer to this crossword clue is the 6 letter word RECAST
I've seen this crossword clue in The Daily Telegraph
R
E
C
A
S
T
More clues leading to the result RECAST
- Remodelled sports ground a second time
- Given a new role take advanced supersonic transport
- Playground on a street reconstructed
- Stop assuming chimera’s exterior’s given new form
- About to engage in leisure in a different form
- Once more model engineers must go to shed
- Rubbish actress almost given new role
- Model again about to join company on stage
- Again throw line out, upsetting crates
- React badly about singer's debut and assign a new performer
Buddy explains!

The straight part
We know that "Once more model" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case once more model = recast.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 RECAST mean?
RECAST noun- The act or process of recasting.
- An utterance translated into another grammatical form.
- To cast or throw again.
- To mould again.
- To reproduce in a new form.
- To assign (roles in a play or performance) to different actors.
- To assign (actors) to different roles.