Lovatts cryptic

[hibiscusrose]

One who speaks in public on behalf of the government(7)

I have:
DEBATER, but I see that others have put in ARBITER.

also
39a Call for another service(3)
pattern:
L - T

Thank you for any help.

[bibblebub]

39a LET - as used in tennis

[hibiscusrose]

Thank you bibblebub. I can always rely on you!
Ann

[bibblebub]

If you look at the 2 definitions

arbiter http://www.thefreedictionary.com/ARBITER
debater http://www.thefreedictionary.com/debater

then arbiter does fit the clue better

[hibiscusrose]

Thanks again bibblebub
Ann

[bibblebub]

glad to help

[Quizmonkey]

How are either of those clues 'cryptic'?

[dannyk13]

I agree with Quizmonkey , what letters do you have?