Lydia changes a regular help in the house (5)
I believe the answer is:
daily
'help in the house' is the definition.
'daily' can be an answer for 'help' (I've seen this before). I'm unsure of the 'in the house' bit.
'lydia changes a regular' is the wordplay.
'lydia' can be anagrammed to 'DAILY'.
But, I am not sure how this is indicated.
Can you help me to learn more?
(Other definitions for daily that I've seen before include "Mon-Sat paper" , "Help" , "Quotidian" , "A rag, perhaps" , "regularly" .)