Doctor Victor Chang holds the light (5)
I believe the answer is:
torch
'the light' is the definition.
(torch is a kind of light)
'doctor victor chang holds' is the wordplay.
'holds' says the answer is hidden in the clue.
'TORCH' is hidden within 'doctor victor chang'.
(Other definitions for torch that I've seen before include "source of illumination" , "Small portable battery-powered electric lamp" , "Deliberately set fire to" , "Hand-held lamp or burning stick" , "Such a love song" .)