Established that clue order is reverse alphabetical - but letters seem to be random, unless they're in grid entry order like the EV about 4 weeks ago.
Need some help on the following to be able to start filling the grid:
*USB initially prepared with small microchip with unconnected logic circuits (3) ???
* Like some old temples of St Columba, lacking soul and old-fashioned (10) ??????????
* Titan perhaps in North America -strange! (4) MOON (I know this can't be right)
* Australian river plant (4) ANIL (I know this can't be right as well)
Note there is an extra letter in the thematic part.