Times Jumbo 934 Cryptic

[Nical]

45 A. Resistance blocking rise after membership fee set at lower level? (8)
s?b?r?u?
I came up with 'suberous' (because it has 'subs'/membership fee) but I don't see how it fits in with the clue.

[dgr1941]

SUBGROUP

[Nical]

Thanks - 'subgroup' was the only other word I had, but I couldn't see how it worked.

[ulysses100]

sub(scription) = membership fee
resistance = R, which is put into (block) "go up" = rise
subgroup=lower level

[Nical]

Thanks, both of you - it seems perfectly clear now.

[ichkeria]

"subgroup=lower level "
subgroup = set at lower lever