Retreat welcomed by queasy lumberjack (6)
I believe the answer is:
asylum
'retreat' is the definition.
(thesaurus)
'welcomed by queasy lumberjack' is the wordplay.
'welcomed by' indicates the answer is hidden within the clue.
'ASYLUM' is hidden in the letters of 'queasy lumberjack'.
(Other definitions for asylum that I've seen before include "'Refuge, sanctuary (6)'" , "Place of safety or protection" , "Shelter given to refugee" , "hostel" , "Madhouse" .)