The most common and most likely answer to this crossword clue is the 7 plus 7 letter word CENTRAL HEATING
I've seen this crossword clue in The Sunday Telegraph
C
E
N
T
R
A
L
H
E
A
T
I
N
G
More clues leading to the result CENTRAL HEATING
- It combats the cold charm heartlessly used in infidelity
- Plumbing system a clue to temperature briefly?
- It doesn’t allow overnight delivery by traditional route
- Comic learning the act that gets house warmed up
- Engaged in adultery, learnt to work out a system domestically?
- Unfair actions about rental amended — that produces warm feeling all round
- 25 7 5?
- This being put on should ensure more than just a warm reception
- Strange change in latter system keeping place warm
Buddy explains!
The straight part
We know that "that produces warm feeling all round" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that produces warm feeling all round = central heating.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.