Troublemakers temporarily live on board (6)
I believe the answer is:
scamps
'troublemakers' is the definition.
(I know this)
'temporarily live on board' is the wordplay.
I cannot quite see how this works, but
'live' could be 'camp' (camping is a kind of living) and 'camp' is found in the answer.
'on board' could be 'ss' (I've seen this in other clues) and 'ss' is found in the leftover letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for scamps that I've seen before include "Mischevious young children" , "Naughty little rascals" , "Little rascals, mischievous children" , "Lively children" , "Scallywags" .)