Secretly enter into rental if it can be arranged (10)
I believe the answer is:
infiltrate
'secretly enter' is the definition.
'infiltrate' can be an answer for 'enter' (to infiltrate is to enter secretly). I am not sure about the 'secretly' bit.
'rental if it can be arranged' is the wordplay.
'can be arranged' indicates anagramming the letters.
'rental'+'if'+'it'='rentalifit'
'rentalifit' with letters rearranged gives 'INFILTRATE'.
'into' is the link.
Can you help me to learn more?
(Other definitions for infiltrate that I've seen before include "Sneak into" , "Slowly and secretly gain access to (an organisation)" , "enter secretly" , "gradually sink in" , "Enter undetected" .)