Admired people I only half think about (5)
I believe the answer is:
icons
'admired people' is the definition.
(significant people in a particular field)
'i only half think about' is the wordplay.
'only half' suggests halving the letters.
'think about' becomes 'consider ' (to consider something is to think about it).
'consider' with half the letters taken is 'cons'.
'i'+'cons'='ICONS'
(Other definitions for icons that I've seen before include "Sonic (anag)" , "Screen symbols on 4 across" , "representative figures?" , "Religious paintings or computer symbols" , "revered art" .)