Look back around kilometre stretches (4)
I believe the answer is:
ekes
'stretches' is the definition.
(I've seen this before)
'look back around kilometre' is the wordplay.
'look' becomes 'see'.
'back' says the letters should be written backwards.
'around' indicates putting letters inside.
'kilometre' becomes 'k' (this could be a standard abbreviation I've not previously seen).
'see' reversed gives 'ees'.
'ees' going around 'k' is 'EKES'.
Can you help me to learn more?
(Other definitions for ekes that I've seen before include "Rab C's extras" , "Lengthens (out)" , "- - out: stretches" , "Makes supplies last longer" , "...out a living, barely makes do" .)