The use of the word “leader” is quite common amongst Christians worldwide to refer to certain people who have a particular responsibility for the care and spiritual nurture of others. There are two words that are translated “lead” in modern versions of the Bible.

The first is προΐστημι (prohistemi); it can mean either:
1) “rule”, “direct”, “be at the head (of)”, or
2) “show concern for”, “care for” or “give aid”.
It occurs in Romans 12:8; 1 Thessalonians 5:12; 1 Timothy 3:4-5, 3:12 and 5:17. In Romans 12:8 and 1 Thessalonians 5:12 it is possible that the word merely means to “show concern for”. But in 1 Timothy 3:4-5, 3:12 and 5:17 the word must have a sense of leadership associated with it.

The second word is ἡγέομαι (hegeomai) and it occurs in Luke 22:26; Acts 15:22; Hebrews 13:7, 17 and 24 in the sense of “leading” or “guiding” in a supervisory capacity.

As far as I can tell neither of these words is used of the Holy Spirit.

Of course it would be unbiblical for somebody to use the word “lead” in a way contrary to the Bible. E.g. Luke 22:26 teaches that the leader must become like a servant. So if somebody used the word “leader” to imply an ongoing superiority, or a privileged status, etc., then it would be valid to assert that they are being “unbiblical”. But Clive, it is utterly ridiculous for you to suggest that simply by using the word “leader” / “leading” I have acted in an “unbiblical” way. I have used a biblical word, and as far as I can tell I have used it biblically.