Personal jewellery: told to secure it? (6)
I believe the answer is:
locket
'personal jewellery' is the definition.
(jewellery typically holding a personal item)
'told to secure it?' is the wordplay.
'told' shows a homophone (sound like).
'to secure' becomes 'lock' (locking is a kind of securing).
'lock' sounds like 'locke'.
'locke'+'t'='LOCKET'
(Other definitions for locket that I've seen before include "Case on a neck chain" , "Ornamental case on necklace for memento" , "Small ornamental case hung round the neck" , "Small ornamental case for photo etc." , "Lucy" .)