Try fitting a new seat to an old model car (5)
I believe the answer is:
taste
'try fitting' is the definition.
'taste' can be an answer for 'try' (synonyms). I'm not sure about the 'fitting' bit.
'a new seat to an old model car' is the wordplay.
'a new' is an anagram indicator.
'to' says to put letters next to each other (I've seen this in other clues).
'an old model car' becomes 't' (I can't justify this - if you can you should believe this answer much more).
'seat' with letters rearranged gives 'aste'.
'aste' after 't' is 'TASTE'.
Can you help me to learn more?
(Other definitions for taste that I've seen before include "To eat sparingly" , "Savour in the mouth" , "Experience - discrimination" , "Sample the flavour" , "Test for flavour" .)