Well done! 

 

A variety (anagram) of coins = sonic

soar in value - boom

Decimals following gear creates little felines

 

7 letters

Kittens

 

(Meeeow)

Yes - it was a bit simple compared to yours.

 

Decimals = tens

following (after) gear = kit

This union has resulted from a flirtation where penny has gone astray. (1 word, 9 letters.)

Oops - I should have said 8 letters - but clearly you have it worked out.

Draw near to a very quiet freshwater fish.

 

1 word 8 letters.

Correct.  a,  pp = very quiet (musical term) roach = freshwater fish.