Dad's initially troubled history (4)

I believe the answer is:

past

'history' is the definition.
(I've seen this in another clue)

'dad's initially troubled' is the wordplay.
'dad's' becomes 'pa's' (pa can mean someone's father).
'initially' suggests taking the first letters.
The initial letter of 'troubled' is 't'.
'pas'+'t'='PAST'

(Other definitions for past that I've seen before include "over and done with" , "Ended" , "A person's earlier life history" , "historical times" , "Second visitor in 5 [A CHRISTMAS CAROL]" .)

I've seen this clue in the Evening Standard.

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