The most common and most likely answer to this crossword clue is the 11 letter word PAINSTAKING
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More clues leading to the result PAINSTAKING
- Father during betting is very careful
- Assiduous old man in street meeting a top man
- Meticulous old man at home putting up posts
- Extremely careful old man, not out gambling
- Conscientious old man at home killing vampires?
- Thorough acupuncture?
- Describe a ruler inspiring society being diligent
- Very careful is Pennsylvania in betting
Buddy explains!

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.
What does PAINSTAKING mean?
PAINSTAKING noun- The application of careful and attentive effort.
- Carefully attentive to details; diligent in performing a process or procedure.