missing link

[manealca]

Each question consists of 3 words, each of which either precede or follow a fourth word.this fourth word is the missing link----the answer to each question is a five letter word.

1.green.chase,tiger
2.digital,analogue,off
3.beacon,control,frequency
4.galley,ship,trade
5.brass,laugh,dark
6.dry,wet,trap
7.root,boat,ray
8.cane,court,widow
9.starting,mental,letter
10.first,count,group
11.blood,bush,soap
12.magnetic,study,hospital
13.point,station,flower
14.duty,lace,cover
15.universal,account,stock

[T&S]

4 slave

[sandyRoe]

1 Paper
2 Watch
3 Radio

[emeritus]

2 Clock ?

[sandyRoe]

8 Grass

[T&S]

10 blood

[emeritus]

9 Block ?

[emeritus]

12 Field

[T&S]

9 block

[sandyRoe]

5 Horse

[manealca]

Thankyou for those answers--you are a clever lot !
How about the following ?

16.cap,sponge,mutton
17.town,country,spider
18.stocking,saw,horse
19,estate,orange,secret
20.green,sauce,crab
21.down,up,on
22 search,line,man
23.concert,boudoir,opera
24.foot,fluid,light
25.air,line,ground
26.oil,shark,blue.
search,line,man

[nightmare]

a few more:
15 joint
17 house
19 agent
20 apple
24 brake