Chap has small standards (5)
I believe the answer is:
norms
'standards' is the definition.
(norm is a kind of standard)
'chap has small' is the wordplay.
I cannot quite see how this works, but
'small' could be 's' (abbreviation - e.g. clothes size) and 's' is found within the answer.
The remaining letters 'norm' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for norms that I've seen before include "Social standards" , "Standards, customs of behaviour" , "Customary behaviour, the usual things" , "Standards of customary behaviour" , "Representative standards as of behaviour" .)