The most common and most likely answer to this crossword clue is the 7 letter word ADHERED
I've seen this crossword clue in The Daily Telegraph
A
D
H
E
R
E
D
More clues leading to the result ADHERED
- Stuck advertisement in this place, close to road
- Stuck in present occupying address
- Awkward redhead may be stuck
- Stuck in this place with tot running around
- Outside this place a theologian held fast
- Stuck join, wrapping present
- Stuck in road here — dangerous
- This area, in sum, got stuck
- Fixed total includes present
- Tot hanging around this place gets stuck
Buddy explains!

The straight part
We know that "held fast" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case held fast = adhered.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 ADHERED mean?
ADHERED verb- To stick fast or cleave, as a glutinous substance does; to become joined or united.
- To be attached or devoted by personal union, in belief, on principle, etc.
- To be consistent or coherent; to be in accordance; to agree.
- To affirm a judgment.