Bear children and be disagreeable (4,5)
I believe the answer is:
take issue
'be disagreeable' is the definition.
I can't tell whether this definition defines the answer.
'bear children' is the wordplay.
'bear' becomes 'take' ('take' can be a synonym of 'bear').
'children' becomes 'issue' (I've seen this before**).
'take'+'issue'='TAKE ISSUE'
'and' is the link.
Can you help me to learn more?
(Other definitions for take issue that I've seen before include "Argue" , "dispute" , "challenge" , "Don't agree" , "to bring the children along" .)