Is he not particular about the terms? (7,6)

'terms?' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

'is he not particular about' is the wordplay.
I cannot really see how this works, but
'he' could be 'gene' and 'gene' is found in the answer.
'about' could be 'a' (abbreviation in Chambers) and 'a' is present in the answer.
This explanation may well be incorrect...

'the' acts as a link.

Can you help me to learn more?