Like something valuable held by Maurice (5)
I believe the answer is:
auric
'like something valuable' is the definition.
(auric means like gold)
'held by maurice' is the wordplay.
'held by' says the answer is hidden in the clue.
'AURIC' can be found hidden inside 'maurice'.
(Other definitions for auric that I've seen before include "Of or containing gold" , "made of gold" , "French composer" , "- Goldfinger (Bond)" , "Golden" .)