Mother takes a long time getting reparation (7)
I believe the answer is:
damages
'reparation' is the definition.
(thesaurus)
'mother takes a long time' is the wordplay.
'mother' becomes 'dam' (female parent of an animal).
'takes' is a charade indicator (letters next to each other).
'a long time' becomes 'ages' (I've seen this before).
'dam'+'ages'='DAMAGES'
'getting' is the link.
(Other definitions for damages that I've seen before include "Moneys paid as compensation for an injury" , "weakens" , "Harms" , "Money awarded as compensation" , "Money paid in compensation for loss or injury" .)