Sluggish Raleigh cyclist exhausted on Tour (9)
I believe the answer is:
lethargic
'sluggish' is the definition.
(synonyms)
'raleigh cyclist exhausted on tour' is the wordplay.
'exhausted' means to remove the middle letters (the word is emptied out or exhausted).
'on tour' is an anagram indicator (letters tour or travel around).
'cyclist' with its centre taken out is 'ct'.
'raleigh'+'ct'='raleighct'
'raleighct' with letters rearranged gives 'LETHARGIC'.
(Other definitions for lethargic that I've seen before include "Enervated" , "Lacking in energy or vitality" , "Sluggish and apathetic" , "Short of energy" , "The garlic (anag.)" .)