Walk like a small ogre (6)
I believe the answer is:
stroll
'walk' is the definition.
(stroll is a kind of walk)
'a small ogre' is the wordplay.
'a small' becomes 's' (abbreviation - e.g. clothes size).
'ogre' becomes 'troll'.
's'+'troll'='STROLL'
'like' acts as a link.
(Other definitions for stroll that I've seen before include "Amble along" , "Meander" , "Walk slowly and idly" , "Constitutional" , "cinch" .)