Sort of bob, remarkably sleek fashion (8)
I believe the answer is:
skeleton
'sort of bob' is the definition.
(type of bobsleigh)
'remarkably sleek fashion' is the wordplay.
'remarkably' indicates an anagram (I've seen this in other clues).
'fashion' becomes 'ton' (I've seen this before).
'sleek' is an anagram of 'skele'.
'skele'+'ton'='SKELETON'
(Other definitions for skeleton that I've seen before include "Possibly key" , "- key; - staff" , "With the team depleted" , "Framework of the body" , "Framework of bones" .)