Is stony, like me being out of money and cross! (4)
I believe the answer is:
onyx
'is stony' is the definition.
I can't judge whether this defines the answer.
'me being out of money and cross' is the wordplay.
'being out of' suggests deleting specific letters ('out of' can mean no longer having).
'and' is a charade indicator (letters next to each other).
'cross' becomes 'x' (an X is a cross).
'money' with 'me' removed is 'ony'.
'ony'+'x'='ONYX'
'like' acts as a link.
Can you help me to learn more?
(Other definitions for onyx that I've seen before include "Quartz used as a gem" , "Stone like marble with layered colours" , "Form of agate" , "Banded chalcedony" , "African antelope" .)