What is a Cryptic Spoonerism ?

Simply put a Cryptic Spoonerism is the concatenation of a Spoonersim and a Cryptic crossword clue.
Firstly you have to solve the cryptic part, this gives you a spoonerism. Then you 'un-spooner' it to arrive at the solution.

The numbers (and possible connecting words) are given in brackets and relate to the final answer and not to any intermediate stage that you use.
As with any spoonerism you really need to say it out loud to appreciate it properly.

Here are a couple of examples to assist:

Healthier Jackets (7, 5) --> Fitter Tweeds --> Twitter Feeds

Tightly clenched fingers and a cat (4, and, 3) --> Fist and Mog --> Mist and Fog
In this example the 'and' is expressly contained along with the numbers in the brackets. Sometimes there may be more than one word in the list or these words may be separated by other words. It all adds to the fun.

Spoonerism:
Wikipedia entry on Spoonerisms is here.

Cryptic crossword:
Wikipedia entry on Cryptic Crosswords is here.

NOTE:-
Only authorised logged in users can see cryptic spoonerisms that contain "words for adults".