Clue: Partners after the Guardian's money entering loan, if poorly represented in time? (4-11)
Answer: FOUR-DIMENSIONAL
Explanation: Definition: represented in time?
An envelope ('entering') of OUR ('the Guardian's') plus DIME ('money') plus NS ('bridge 'partners') in FIONAL, an anagram ('poorly') of 'loan if'. After some hesitation, I plumped for including 'represented' in the definition.