Fussy manager runs through ground then home (6,3)
I believe the answer is:
mother hen
'fussy manager' is the definition.
The definition suggests a singular noun which matches the answer.
'runs through ground then home' is the wordplay.
'runs' becomes 'r' (abbreviation in cricket).
'through' is an insertion indicator (inserted letters go through the word).
'ground' indicates anagramming the letters ('grind' the letters into a new form).
'then'+'home'='thenhome'
'thenhome' with letters rearranged gives 'mothehen'.
'r' going into 'mothehen' is 'MOTHER HEN'.
Can you help me to learn more?
(Another definition for mother hen that I've seen is " Protective female".)