Consciously old-fashioned, suitable to modernise later (8)
I believe the answer is:
retrofit
'modernise later' is the definition.
I can't judge whether this definition defines the answer.
'consciously old-fashioned suitable' is the wordplay.
'consciously old-fashioned' becomes 'retro' (I've seen this before).
'suitable' becomes 'fit' (similar in meaning).
'retro'+'fit'='RETROFIT'
'to' is the link.
Can you help me to learn more?
(Other definitions for retrofit that I've seen before include "Make later modifications to (equipment, etc)" , "Modification made after manufacture" , "Add (component) not originally in place" , "Fit with accessory not on original" , "Belatedly modify" .)