The old tyres are fixed in the past (10)
I believe the answer is:
yesteryear
'in the past' is the definition.
(I've seen this before)
'the old tyres are fixed' is the wordplay.
'the old' becomes 'ye' (resembles a historical spelling of 'the').
'fixed' indicates anagramming the letters.
'tyres'+'are'='tyresare'
'tyresare' is an anagram of 'steryear'.
'ye'+'steryear'='YESTERYEAR'
(Other definitions for yesteryear that I've seen before include "Period 14 [CENTENARIAN] lived through" , "Rossetti's translation questioned whereabouts of its snows!" , "Days gone by" , "Twelve months ago" , "Days of old (poet.)" .)