Hairy beasts shown in still lives (5)
I believe the answer is:
yetis
'hairy beasts' is the definition.
(yetis are hairy creatures)
'still lives' is the wordplay.
'still' becomes 'yet' (yet can mean still or so far).
'lives' becomes 'is' ('be' can be a synonym of 'live').
'yet'+'is'='YETIS'
'shown in' acts as a link.
(Other definitions for yetis that I've seen before include "Rarely seen group of creatures" , "Mythical creatures" , "Beasts that aren't real" , "Abominable snowmen" , "fantastic beasts" .)