Bicipital iceman keeps leaning to the right (6)
I believe the answer is:
italic
'leaning to the right' is the definition.
(I've seen this in another clue)
'bicipital iceman keeps' is the wordplay.
'keeps' indicates the answer is hidden within the clue.
'ITALIC' is hidden within 'bicipital iceman'.
(Other definitions for italic that I've seen before include "Type of script" , "from Rome?" , "Slanting character" , "identifies a branch of languages?" , "more oblique than Roman" .)