One who's left work about to go to Scottish island (7)
I believe the answer is:
retiree
'one who's left work' is the definition.
I can't tell whether this defines the answer.
'about to go to scottish island' is the wordplay.
'about to' becomes 're' (I've seen this in other clues).
'go to' means one lot of letters go next to another.
'scottish island' becomes 'tiree' (island of the Inner Hebrides).
're'+'tiree'='RETIREE'
Can you help me to learn more?
(Other definitions for retiree that I've seen before include "Pensioner" , "One who has ceased to work" , "One put out to pasture" , "One having completed work" , "Person out of work" .)