Politician taking a long time in bill amendment (7)
I believe the answer is:
liberal
'politician' is the definition.
(I've seen this before)
'a long time in bill amendment' is the wordplay.
'a long time' becomes 'era' (a long period of time).
'in' means one lot of letters goes inside another.
'amendment' indicates anagramming the letters.
'bill' is an anagram of 'libl'.
'era' going inside 'libl' is 'LIBERAL'.
'taking' acts as a link.
(Other definitions for liberal that I've seen before include "Braille (anag.)" , "Generous; broad-minded" , "Tolerant and open-minded in Braille" , "Favouring a political philosophy of progress and reform" , "magnanimous" .)