Hurry up and fix gas leak, eh? (5,1,3)
I believe the answer is:
shake a leg
'hurry up' is the definition.
(I've seen this before)
'fix gas leak eh?' is the wordplay.
'fix' indicates anagramming the letters.
'gas'+'leak'+'eh'='gasleakeh'
'gasleakeh' is an anagram of 'SHAKE A LEG'.
'and' acts as a link.
(Other definitions for shake a leg that I've seen before include "Get up - be productive" , "Hurry up" , "Get a move on" .)