Fibber describing golf — and somehow they can make a huge distance (5,4)
I believe the answer is:
light year
'a huge distance' is the definition.
(very large distance)
'fibber describing golf and somehow they' is the wordplay.
'fibber' becomes 'liar' (fib means to lie).
'describing' is an insertion indicator (describe can mean to form the outline of).
'golf' becomes 'g' (phonetic alphabet: alpha, bravo, charlie etc.).
'and' is a charade indicator (letters next to each other).
'somehow' indicates anagramming the letters.
'they' is an anagram of 'htye'.
'g'+'htye'='ghtye'
'liar' placed around 'ghtye' is 'LIGHT-YEAR'.
'can make' acts as a link.
(Other definitions for light year that I've seen before include "such a long way to travel" , "About six million million miles per annum" , "astronomically large" , "Large unit of distance" , "0.3066 parsecs" .)