Lord ruined in Great War, returning to get married, provides many pages with connections (5,4,3)

'many pages with connections' is the definition.
(as in web pages)

'lord ruined in great war returning to get married' is the wordplay.
'ruined' indicates an anagram.
'in' indicates putting letters inside.
'great war' becomes 'wwi' (World War One or WW1 was called the Great War).
'returning' shows that the letters should be reversed in order.
'to get married' becomes 'bewed' (to be wed is to get married).
'bewed' reversed gives 'deweb'.
'lord' with letters rearranged gives 'orld'.
'orld' placed within 'wwi' is 'worldwi'.
'worldwi'+'deweb'='WORLD WIDE WEB'

'provides' is the link.