25 across
On
regular
occasions,
situations
lead
to
sticky
spots
(6)
On regular occasions, situations lead to sticky spots (6)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
The definition is sticky spots. The wordplay takes "situations" and extracts every other letter ("on regular occasions"), giving S-T-A-I-N. Then "lead to" tells you to take the first letter of "sticky", which is S. Put them together and you get STAINS.