Mum to loiter and swing the lead (8)
I believe the answer is:
malinger
'and swing the lead' is the definition.
I can't judge whether this definition defines the answer.
'mum to loiter' is the wordplay.
'mum' becomes 'ma' (ma can mean mother).
'to loiter' becomes 'linger' ('linger' can be a synonym of 'loiter').
'ma'+'linger'='MALINGER'
Can you help me to learn more?
(Other definitions for malinger that I've seen before include "Pretend to be ill to avoid work" , "Germinal (anag.)" , "Slack in germinal fashion" , "To shirk work" , "Loaf about in germinal way" .)