Matronly language? (6,6)
I believe the answer is:
mother tongue
'matronly language?' is the definition.
'mother tongue' can be an answer for 'language?' (mother tongue is a kind of language). I'm not certain of the 'matronly' bit.
'matronly language?' is the wordplay.
'matronly' becomes 'mother' (I can't explain this - if you can you should give a lot more credence to this answer).
'language?' becomes 'tongue' (tongue can mean a language).
'mother'+'tongue'='MOTHER-TONGUE'
Can you help me to learn more?
(Other definitions for mother tongue that I've seen before include "Native language" , "Language used" .)