Transport uncle, for one, right away (7)
I believe the answer is:
elation
'transport' is the definition.
(I know that transport can be written as elation)
'uncle for one right away' is the wordplay.
'uncle for one' becomes 'relation' (uncle is a kind of relation).
'right' becomes 'r' (common abbreviation).
'away' suggests deleting specific letters.
'relation' with 'r' taken away is 'ELATION'.
(Other definitions for elation that I've seen before include "High feeling?" , "Delight, thrill" , "Toenail (anag) -- delight" , "'High spirits, exhilaration (7)'" , "Feeling of joy for it alone" .)