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' means one lot of letters go next to another.
'cross' becomes 'x' (an X is a cross).
'money' with 'me' taken out is 'ony'.
'ony'+'x'='ONYX'
'like' is the 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" .)