Tree with lowered resistance, in consequence put down (7)
I believe the answer is:
Here is my best explanation:
'put down' is the definition.
(I've seen this before)
'tree with lowered resistance in consequence' is the wordplay.
I cannot really understand how this works, but
an anagram of 'tree' is 'tere' which is within the answer.
The remaining letters 'end' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
(Other definitions for entered that I've seen before include "moved in", "Ten deer (anag) - went in", "Went in and registered as competitor", "Enrolled or went in", "Registered", "Put down", "Logged; arrived" and "Came in; recorded".)