Treat person in trouble, offering a lift (11)
I believe the answer is:
paternoster
'a lift' is the definition.
(paternoster is a kind of lift)
'treat person in trouble' is the wordplay.
'in trouble' indicates anagramming the letters.
'treat'+'person'='treatperson'
'treatperson' with letters rearranged gives 'PATERNOSTER'.
'offering' acts as a link.
(Other definitions for paternoster that I've seen before include "One can get uplifted by this" , "that could take people to a different level" , "The Lord''s Prayer" , "supplication" , "a continuous lift" .)