Actually, get a mat off car seat before starting trip (2,1,6,2,4)
I believe the answer is:
as a matter of fact
'actually' is the definition.
(synonyms)
'a mat off car seat before starting trip' is the wordplay.
I cannot really see how this works, but
'a' is found in the answer.
'mat' could be 'matte' (synonyms) and 'matte' is present in the answer.
'car' could be 't' and 't' is found within the answer.
This may be the basis of clue (or it may be nonsense).
'get' is the link.
Can you help me to learn more?
(Other definitions for as a matter of fact that I've seen before include "in reality" , "Actually" .)