Young chap carrying goods, a right dawdler! (7)
I believe the answer is:
laggard
'dawdler' is the definition.
(I know that dawdler can be written as laggard)
'young chap carrying goods a right' is the wordplay.
'young chap' becomes 'lad' (I've seen this before).
'carrying' means one lot of letters goes inside another.
'goods' becomes 'gg' (an abbreviation for 'good' repeated).
'a right' becomes 'ar' (I've seen this in other clues).
'gg'+'ar'='ggar'
'lad' going around 'ggar' is 'LAGGARD'.
(Other definitions for laggard that I've seen before include "slower than expected" , "Dawdler" , "See straggler" , "Dilatory person" , "Drag gal around for one who falls behind" .)