Entrants into the field may use it less, perhaps (6)
I believe the answer is:
stiles
'entrants into the field may use' is the definition.
I can't judge whether this definition defines the answer.
'it less perhaps' is the wordplay.
'perhaps' indicates anagramming the letters.
'it'+'less'='itless'
'itless' anagrammed gives 'STILES'.
Can you help me to learn more?
(Other definitions for stiles that I've seen before include "Sets of steps in a fence" , "Steps to help walkers over fences or walls" , "Sets of steps in fences" , "Fence-steps in islets" .)