Bring up easily portable car part (4,5)
I believe the answer is:
rear light
'car part' is the definition.
(I've seen this before)
'bring up easily portable' is the wordplay.
'bring up' becomes 'rear' (synonyms).
'easily portable' becomes 'light' (easy to carry).
'rear'+'light'='REAR-LIGHT'
(Other definitions for rear light that I've seen before include "Whereby vehicle may be seen" , "Stern glower" , "part of car" , "late display of driving" , "car component" .)