It's clear son has no money (8)
I believe the answer is:
spotless
'it's clear son has no money' is the definition.
I can't judge whether this defines the answer.
'it's clear son has no money' is the wordplay.
I cannot really see how this works, but
'it's' could be 'es' ('e' can mean 'electronic' which is similar to 'IT') and 'es' is present in the answer.
'son' could be 's' (genealogical abbreviation for son) and 's' is found within the answer.
'no' could be 'o' (resembles 0 - 'no' can mean 'zero') and 'o' is present in the answer.
'money' could be 'p' and 'p' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for spotless that I've seen before include "Absolutely pure, clean" , "How Lady Macbeth wanted to be" , "What unsuccessful twitchers do" , "Irreproachably clean" , "honest!" .)