Rich, having some wealth, nevertheless mortal (5)
I believe the answer is:
fatal
'nevertheless mortal' is the definition.
'fatal' can be an answer for 'mortal' (similar in meaning). I am unsure of the 'nevertheless' bit.
'rich having some wealth' is the wordplay.
'rich' becomes 'fat' (rich can describe fat or creamy food).
'having' means one lot of letters go next to another.
'some' indicates the central letters.
The middle of 'wealth' is 'al'.
'fat'+'al'='FATAL'
Can you help me to learn more?
(Other definitions for fatal that I've seen before include "Bringing death" , "Disastrous, maybe lethal" , "Calamitous" , "Unavoidable" , "Causing death, say accident" .)