Cryptic crossword clue
Detailed writer needs time, hard lead and a rubber for this 5,7

The most common and most likely answer to this crossword clue is the 5 plus 7 letter word BIRTH CONTROL

I've seen this crossword clue in The Guardian
B
I
R
T
H
C
O
N
T
R
O
L

Buddy explains!

The straight part
We know that "a rubber for this" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a rubber for this = birth control.
The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.
This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.

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